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The DFV is an
internal combustion engine An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal combus ...
that was originally produced by
Cosworth Cosworth is a British automotive engineering company founded in London in 1958, specialising in high-performance internal combustion engines, powertrain, and electronics for automobile racing (motorsport) and mainstream automotive industrie ...
for
Formula One Formula One (also known as Formula 1 or F1) is the highest class of international racing for open-wheel single-seater formula racing cars sanctioned by the Fédération Internationale de l'Automobile (FIA). The World Drivers' Championship, ...
motor racing Motorsport, motorsports or motor sport is a global term used to encompass the group of competitive sporting events which primarily involve the use of motorized vehicles. The terminology can also be used to describe forms of competition of two ...
. The name is an abbreviation of ''Double Four Valve'', the engine being a V8 development of the earlier four-cylinder FVA, which had four valves per cylinder. Its development in 1967 for
Colin Chapman Anthony Colin Bruce Chapman (19 May 1928 – 16 December 1982) was an English design engineer, inventor, and builder in the automotive industry, and founder of Lotus Cars. In 1952 he founded the sports car company Lotus Cars. Chapman ...
's
Team Lotus Team Lotus was the motorsport sister company of English sports car manufacturer Lotus Cars. The team ran cars in many motorsport categories including Formula One, Formula Two, Formula Ford, Formula Junior, IndyCar, and sports car racing. More ...
was sponsored and funded by major American automotive manufacturer
Ford Ford commonly refers to: * Ford Motor Company, an automobile manufacturer founded by Henry Ford * Ford (crossing), a shallow crossing on a river Ford may also refer to: Ford Motor Company * Henry Ford, founder of the Ford Motor Company * Ford F ...
. For many years it was the dominant engine in Formula One, with the whole engine program funded by Ford's European division,
Ford Europe Ford of Europe GmbH is a subsidiary company of Ford Motor Company founded in 1967 in Cork (city), Cork, Republic of Ireland, Ireland, with headquarters in Cologne, Germany. History Ford of Europe was founded in 1967 by the merger of Ford of Bri ...
and engines badged as "Ford" for Formula One championship races. DFVs were widely available from the late 1960s to the mid 1980s and were used by every specialist team in F1 during this period with the exception of Ferrari, Alfa Romeo, Renault, BRM and Matra, who all designed, produced and ran their own engines. Variants of this engine were also used in other categories of racing, including
CART A cart or dray (Australia and New Zealand) is a vehicle designed for transport, using two wheels and normally pulled by one or a pair of draught animals. A handcart is pulled or pushed by one or more people. It is different from the flatbed tr ...
,
Formula 3000 Formula 3000 (F3000) was a type of open wheel, single seater formula racing, occupying the tier immediately below Formula One and above Formula Three. It was so named because the cars were powered by 3.0 L engines. Formula 3000 championships ...
and
sports car racing Sports car racing is a form of motorsport road racing which utilises sports cars that have two seats and enclosed wheels. They may be purpose-built prototypes or grand tourers based on road-going models. Broadly speaking, sports car racing is ...
. The engine is a 90°, 2,993 cc V8 with a bore and stroke of 85.67 × 64.90 mm (3.373 × 2.555 in) producing over 400 bhp (408 bhp at 9,000 rpm, torque at 7,000 rpm was quoted) from the start reaching over 500 bhp (510 bhp at 11,200 rpm was quoted) by the end of its Formula 1 career. The 1983 DFY variant had a revised bore and stroke of 90.00 × 58.83 mm (3.543 × 2.316 in) giving 2,993 cc and 520–530 bhp at 11,000 rpm, torque at 8,500 rpm.


Background

In 1965, the
Fédération Internationale de l'Automobile The Fédération Internationale de l'Automobile (FIA; en, International Automobile Federation) is an association established on 20 June 1904 to represent the interests of motoring organisations and motor car users. It is the governing body for ...
, that administered
Formula One Formula One (also known as Formula 1 or F1) is the highest class of international racing for open-wheel single-seater formula racing cars sanctioned by the Fédération Internationale de l'Automobile (FIA). The World Drivers' Championship, ...
racing, agreed to raise the series' maximum engine capacity from to from 1966. Up until that point,
Colin Chapman Anthony Colin Bruce Chapman (19 May 1928 – 16 December 1982) was an English design engineer, inventor, and builder in the automotive industry, and founder of Lotus Cars. In 1952 he founded the sports car company Lotus Cars. Chapman ...
's successful
Team Lotus Team Lotus was the motorsport sister company of English sports car manufacturer Lotus Cars. The team ran cars in many motorsport categories including Formula One, Formula Two, Formula Ford, Formula Junior, IndyCar, and sports car racing. More ...
cars had relied on power from fast revving
Coventry Climax Coventry Climax was a British forklift truck, fire pump, racing, and other specialty engine manufacturer. History Pre WW1 The company was started in 1903 as Lee Stroyer, but two years later, following the departure of Stroyer, it was reloca ...
engines, but with the change in regulations Coventry Climax decided for business reasons not to develop a large capacity engine. Chapman approached
Keith Duckworth David Keith Duckworth (10 August 1933 – 18 December 2005) was an English mechanical engineer. He is most famous for designing the Cosworth DFV (Double Four Valve) engine, an engine that revolutionised the sport of Formula One. Early life a ...
, previously a gearbox engineer at Lotus but now running his fledgling
Cosworth Cosworth is a British automotive engineering company founded in London in 1958, specialising in high-performance internal combustion engines, powertrain, and electronics for automobile racing (motorsport) and mainstream automotive industrie ...
company with
Mike Costin Michael Charles Costin (born 10 July 1929, in Hendon) was, together with Keith Duckworth, the co-founder of Cosworth Engineering, a producer of Ford-funded and sponsored engines. Drivers including Graham Hill, Jackie Stewart, Jochen Rindt, Emerso ...
, who commented that he could produce a competitive three-litre engine, given a development budget of £100,000. Chapman approached the
Ford Motor Company Ford Motor Company (commonly known as Ford) is an American multinational automobile manufacturer headquartered in Dearborn, Michigan, United States. It was founded by Henry Ford and incorporated on June 16, 1903. The company sells automobi ...
and David Brown of
Aston Martin Aston Martin Lagonda Global Holdings PLC is an English manufacturer of luxury sports cars and grand tourers. Its predecessor was founded in 1913 by Lionel Martin and Robert Bamford. Steered from 1947 by David Brown, it became associated with ...
for funding, each without initial success. Chapman then approached Ford of Britain's public relations chief, former journalist
Walter Hayes Walter Leopold Arthur Hayes (12 April 1924 – 26 December 2000) was an English journalist, and later public relations executive for Ford. Hayes was key in developing Ford's Formula One program, by signing Jackie Stewart and funding the bui ...
, with whom he had developed a close working relationship from the early 1960s. Since Hayes had joined Ford in 1962 the pair had previously collaborated in the production of the successful
Lotus Cortina Lotus Cortina is the commonly used term for the Ford Cortina Lotus, a high-performance sports saloon, which was produced in the United Kingdom from 1963 to 1970 by Ford in collaboration with Lotus Cars. The original version, which was based on ...
, introduced in 1963. Hayes arranged dinner for Chapman with Ford employee
Harley Copp Harley F. Copp (1922 in Kansas – October 11, 1991 in San Clemente, California), was an American car designer and automotive safety consultant. A 35-year veteran of the Ford Motor Company, Copp made his name leading the engineering design of vari ...
, a British-based American engineer who had backed and engineered Ford's successful entry into
NASCAR The National Association for Stock Car Auto Racing, LLC (NASCAR) is an American auto racing sanctioning and operating company that is best known for stock car racing. The privately owned company was founded by Bill France Sr. in 1948, and hi ...
in the 1950s. Hayes and Copp developed a business plan, which was backed by Ford UK's new chairman
Stanley Gillen Stanley James Gillen (August 10, 1911 – July 1978) was an Ohio born automobile executive who filled a series with high level appointments in the United States and subsequently in Europe with the Ford Motor Company. Gillen joined the Ford M ...
, and approved by Ford's Detroit head office as a two-part plan: *Stage one would produce a four-cylinder FVA twin-cam engine for
Formula Two Formula Two (F2 or Formula 2) is a type of open-wheel formula racing category first codified in 1948. It was replaced in 1985 by Formula 3000, but revived by the FIA from 2009–2012 in the form of the FIA Formula Two Championship. The name retur ...
*Stage two would produce a
V8 engine A V8 engine is an eight-cylinder piston engine in which two banks of four cylinders share a common crankshaft and are arranged in a V configuration. The first V8 engine was produced by the French Antoinette company in 1904, developed and us ...
for Formula One, by May 1967


Formula One

The project was revealed by Hayes in a PR launch in Detroit at the end of 1965, but the engine was not ready until the third race of the 1967 season, on the 4 June at
Zandvoort Zandvoort () is a municipality in the province of North Holland, Netherlands. It is one of the major beach resorts of the Netherlands; it has a long sandy beach. It is bordered by coastal dunes of Zuid-Kennemerland National Park and the Amsterdam ...
. Its debut proved successful.
Graham Hill Norman Graham Hill (15 February 1929 – 29 November 1975) was a British racing driver and team owner, who was the Formula One World Champion twice, winning in and as well as being runner up on three occasions (1963, 1964 and 1965). Despite ...
, who was in the team at the specific request of Ford and Hayes, put his DFV-powered
Lotus 49 The Lotus 49 was a Formula One racing car designed by Colin Chapman and Maurice Philippe for the 1967 F1 season. It was designed around the Cosworth DFV engine that would power most of the Formula One grid through the 1970s. It was one of the fi ...
on
pole position In a motorsports race, the pole position is usually the best and "statistically the most advantageous" starting position on the track. The pole position is usually earned by the driver with the best qualifying times in the trials before the rac ...
by half a second and led for the first 10 laps but was then sidelined by a broken gear in the camshaft drive. Team-mate
Jim Clark James Clark Jr. OBE (4 March 1936 – 7 April 1968) was a British Formula One racing driver from Scotland, who won two World Championships, in 1963 and 1965. A versatile driver, he competed in sports cars, touring cars and in the Indianapol ...
moved up through the field in his identical car and came home to win. However, this dominant performance belied a serious fault in the timing gear. Clark took three more wins that season, but reliability problems left him third in the Drivers' Championship, 10 points behind champion
Denny Hulme Denis Clive Hulme (18 June 1936 – 4 October 1992), commonly known as Denny Hulme, was a New Zealand racing driver who won the Formula One World Drivers' Championship for the Brabham team. Between his debut at Monaco in 1965 and his ...
. The progress of the engine was documented in a film produced by the Ford Motor Company's film section, entitled '' 9 Days in Summer''. Initially, the agreement between Ford, Cosworth and Lotus was binding on all parties, and Ford as the funder had no plans to sell or hire the DFV to any other teams. However, it occurred to Hayes that there was no competition: the
Ferrari Ferrari S.p.A. (; ) is an Italian luxury sports car manufacturer based in Maranello, Italy. Founded by Enzo Ferrari (1898–1988) in 1939 from the Alfa Romeo racing division as ''Auto Avio Costruzioni'', the company built its first car in ...
engine was underpowered; the
BRM British Racing Motors (BRM) was a British Formula One motor racing team. Founded in 1945 and based in the market town of Bourne in Lincolnshire, it participated from 1951 to 1977, competing in 197 grands prix and winning seventeen. BRM wo ...
complex and too heavy; the
Maserati Maserati S.p.A. () is an Italian luxury vehicle manufacturer. Established on 1 December 1914, in Bologna, Italy, the company's headquarters are now in Modena, and its emblem is a trident. The company has been owned by Stellantis since 2021. Ma ...
unreliable; the
Honda is a Japanese public multinational conglomerate manufacturer of automobiles, motorcycles, and power equipment, headquartered in Minato, Tokyo, Japan. Honda has been the world's largest motorcycle manufacturer since 1959, reaching a product ...
overweight; while
Dan Gurney Daniel Sexton Gurney (April 13, 1931 – January 14, 2018) was an American racing driver, race car constructor, and team owner who reached racing's highest levels starting in 1958. Gurney won races in the Formula One, Indy Car, NASCAR, Can-Am, ...
's
Weslake Weslake & Co also known as Weslake Research and Development was founded by Harry Weslake, described as England's greatest expert on cylinder head design, with premises in Rye, East Sussex, England. Weslake is most famous for its work with Bentley, ...
motor was powerful but unreliable. Only Brabham's
Repco V8 Repco is an Australian automotive engineering/retailer company. Its name is an abbreviation of Replacement Parts Company and was for many years known for reconditioning engines and for specialized manufacturing, for which they gained a high ...
engine provided a usable combination of power, lightness and reliability, but its age and design left little room for further improvement. Hayes concluded that Ford's name could become tarnished if the Lotus were to continue winning against only lesser opposition, and that they should agree to use the unit in other teams, and hence potentially dominate Formula One. At the end of 1967, Copp and Hayes gently explained to Chapman that he would no longer have monopoly use of the DFV and in August 1967 it was announced that the power unit would be available for sale, via Cosworth Engineering, to racing teams throughout the world. Hayes released the DFV initially to French team
Matra Matra (an acronym for Mécanique Aviation Traction) was a French industrial conglomerate. During its years of operation, it was engaged in a wide range of business activities, primarily focused around automobiles, bicycles, aeronautics and w ...
, headed by
Ken Tyrrell Robert Kenneth Tyrrell (3 May 1924 – 25 August 2001) was a British Formula Two racing driver and the founder of the Tyrrell Formula One constructor.Setright, L. J. K. "Tyrrell: A Shrewd Talent-spotter", in Northey, Tom, ed. ''World of Automo ...
with
Jackie Stewart Sir John Young Stewart (born 11 June 1939), known as Jackie Stewart, is a British former Formula One racing driver from Scotland. Nicknamed the "Flying Scot", he competed in Formula One between 1965 and 1973, winning three World Drivers' Cha ...
as a driver. What followed was a golden age, where teams big or small could buy an engine which was competitive, light, compact, easy to work with and relatively cheap (£7,500 at 1967 prices or about £90,000 in 2005 money). The DFV effectively replaced the
Coventry Climax Coventry Climax was a British forklift truck, fire pump, racing, and other specialty engine manufacturer. History Pre WW1 The company was started in 1903 as Lee Stroyer, but two years later, following the departure of Stroyer, it was reloca ...
as the standard F1 powerplant for the private (mostly British) teams. Lotus,
McLaren McLaren Racing Limited is a British motor racing team based at the McLaren Technology Centre in Woking, Surrey, England. McLaren is best known as a Formula One constructor, the second oldest active team, and the second most successful Formul ...
,
Matra Matra (an acronym for Mécanique Aviation Traction) was a French industrial conglomerate. During its years of operation, it was engaged in a wide range of business activities, primarily focused around automobiles, bicycles, aeronautics and w ...
,
Brabham Brabham () is the common name for Motor Racing Developments Ltd., a British racing car manufacturer and Formula One racing team. Founded in 1960 by Australian driver Jack Brabham and British-Australian designer Ron Tauranac, the team won four ...
,
March March is the third month of the year in both the Julian and Gregorian calendars. It is the second of seven months to have a length of 31 days. In the Northern Hemisphere, the meteorological beginning of spring occurs on the first day of Marc ...
,
Surtees The Surtees Racing Organisation was a race team that spent nine seasons (1970 to 1978) as a constructor in Formula One, Formula 2, and Formula 5000. History The team was formed by John Surtees, a four-time 500cc motorcycle champion and the ...
, Tyrrell, Hesketh,
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, Williams,
Penske Penske Corporation, Inc. () is an American diversified transportation services company based in Bloomfield Township, Oakland County, Michigan. Roger Penske is the chairman of the privately held company, and Rob Kurnick is the president. Holding ...
,
Wolf The wolf (''Canis lupus''; : wolves), also known as the gray wolf or grey wolf, is a large canine native to Eurasia and North America. More than thirty subspecies of ''Canis lupus'' have been recognized, and gray wolves, as popularly u ...
and
Ligier Ligier (() is a French automobile and minibus maker created by former racing driver and rugby player Guy Ligier (1930–2015), specialized in the manufacturing of microcars. Ligier is best known for its involvement in the Formula 1 World Champio ...
are just some of the teams to have used the DFV. In 1969 and 1973 every World Championship race was won by DFV-powered cars, with the engine taking a total of 155 wins from 262 races between 1967 and 1985. The advent of ground effect aerodynamics on the F1 scene in 1977 provided a new lease of life for the now decade-old engine. The principle relied on Venturi tunnels on the underside of the car to create low pressure regions and thus additional downforce. Previously, teams running
Ferrari Ferrari S.p.A. (; ) is an Italian luxury sports car manufacturer based in Maranello, Italy. Founded by Enzo Ferrari (1898–1988) in 1939 from the Alfa Romeo racing division as ''Auto Avio Costruzioni'', the company built its first car in ...
and
Alfa-Romeo Alfa Romeo Automobiles S.p.A. () is an Italian luxury car manufacturer and a subsidiary of Stellantis. The company was founded on 24 June 1910, in Milan, Italy. "Alfa" is an acronym of its founding name, "Anonima Lombarda Fabbrica Automobili." ...
flat-12 A flat-twelve engine, also known as a horizontally opposed-twelve, is a twelve-cylinder piston engine with six cylinders on each side of a central crankshaft. Flat-twelve engines are less common than V12 engines, but they have been used in vario ...
engines had enjoyed a handling advantage due to the low centre of gravity in such a configuration. However, for ground effect, the wide engine was completely the opposite of what was required as the cylinder heads protruded into the area where the Venturi tunnels should have been. In contrast, the V-configuration of the Cosworth engine angled the cylinders upwards and left ample space under the car for the necessary under-body profile which massively increased downforce and gave more efficient aero balance, thus increasing cornering potential and straight line speed. Ground effect British cars and DFV engines effectively killed off the V12/flat 12 engines of Ferrari and Alfa Romeo which many pundits had believed in the mid-1970s would dominate F1 well into the mid-1980s. Drivers Mario Andretti in , Alan Jones in , Nelson Piquet in and
Keke Rosberg Keijo Erik Rosberg (born 6 December 1948), known as "Keke" (), is a Finnish former racing driver and winner of the Formula One World Championship. He was the first Finnish driver to compete regularly in the series, as well as the first Finnish ...
in used a combination of British ground effect chassis and a DFV engine to claim the Drivers' Championship while DFV-powered cars took the Formula 1 Constructors' World Championship in 1978, 1980 and 1981. The onset of the
turbo In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...
era in the early 1980s put an end to the DFV's F1 activities, as even with modifications the 15-year-old engine could not hope to compete with the vast power being put out by the new 1.5-litre turbocharged engines. However, in the early days of turbo F1 cars (1979–1982) the Renault, Ferrari and Toleman were unable to offer consistent opposition to the Cosworth DFV British teams. The early turbo Renault, though powerful (particularly so on high altitude tracks such as
Interlagos Interlagos is a neighborhood located in the district of Socorro in the city of São Paulo, Brazil. Its name comes from the fact that the region is located between two large reservoirs, Guarapiranga and Billings, built in the early 20th century ...
,
Kyalami Kyalami Grand Prix Circuit (from ''Khaya lami'', ''My home'' in Zulu) is a motor racing circuit located in Midrand, Gauteng, South Africa, just north of Johannesburg. The circuit has been used for Grand Prix and Formula One races and has ho ...
,
Jarama Jarama () is a river in central Spain. It flows north to south, and passes east of Madrid where the El Atazar Dam is built on a tributary, the Lozoya River. It flows into the river Tagus in Aranjuez. The Manzanares is a tributary of the Jaram ...
,
Dijon-Prenois Dijon-Prenois is a motor racing circuit located in Prenois, near Dijon, France. The undulating track is noted for its fast, sweeping bends. Opened in 1972, Dijon-Prenois hosted the Formula One French Grand Prix five times, and the Swiss Grand Pr ...
and the
Österreichring The Red Bull Ring is a motorsport race track in Spielberg, Styria, Austria. The race circuit was founded as Österreichring (translation: Austrian Circuit) and hosted the Austrian Grand Prix for 18 consecutive years, from to . It was later sho ...
) were much heavier, cumbersome, complicated and significantly, much more unreliable than the British Cosworth DFV teams. The extra power and torque of a turbo engine put much more strain on the gearbox, driveshafts and brakes on the Renaults and Ferraris, and during the early 1980s the sight of a Renault or Ferrari wilting under the strain of its extra power was a common sight. The turbo engine was also hampered by "throttle lag", a delay in throttle response which made the turbo cars very slow on tight, twisty circuits such as Monaco, Long Beach, Zolder, Montreal, Brands Hatch and Detroit, whereas the normally-aspirated Cosworth DFV enjoyed pin-sharp response and accuracy. Also, the light and agile British cars exploited ground-effect technology so well that even on fast tracks such as
Buenos Aires Buenos Aires ( or ; ), officially the Autonomous City of Buenos Aires ( es, link=no, Ciudad Autónoma de Buenos Aires), is the capital and primate city of Argentina. The city is located on the western shore of the Río de la Plata, on South ...
,
Silverstone Silverstone is a village and civil parish in Northamptonshire, England. It is about from Towcester on the former A43 main road, from the M1 motorway junction 15A and about from the M40 motorway junction 10, Northampton, Milton Keynes and B ...
,
Hockenheim Hockenheim () is a town in northwest Baden-Württemberg, Germany, about 20 km south of Mannheim and 10 km west of Walldorf. It is located in the Upper Rhine valley on the tourist theme routes "Baden Asparagus Route" () and Bertha Benz M ...
the DFV engine was able to win. For a few years, between 1977 when Renault debuted the powerful but unreliable turbo engine and 1982 when the DFV-powered teams began to negotiate deals for turbo engines of their own, a competitive equilibrium was established.
Michele Alboreto Michele Alboreto (; 23 December 1956 – 25 April 2001) was an Italian racing driver. He was runner up to Alain Prost in the 1985 Formula One World Championship, as well as winning the 1997 24 Hours of Le Mans and 2001 12 Hours of Sebring spo ...
took the DFV's last F1 win in a Tyrrell at the in 1983, and
Martin Brundle Martin John Brundle (born 1 June 1959) is a British former racing driver, best known as a Formula One driver and as a commentator for ITV Sport from 1997 to 2008, the BBC from 2009 to 2011, and Sky Sports since 2012. Brundle contested the 19 ...
was the last person to race in F1 with a DFV, also in a Tyrrell at the in 1985. Some Cosworth-using constructors developed their engines in house during a Grand Prix season, such as John Nicholson's Nicholson McLaren operation or Williams F1 using John Judd's workshops to uprate the standard 480 BHP that the DFV was producing in the late 1970s/early 1980s. Uprated pistons, camshafts and valves meant Williams and McLaren's DFVs were producing over 510BHP at around 11,000RPM by the early 1980s, which meant the power deficit to the turbocharged Renaults and Ferraris was only around 30–40BHP in race trim. Since a DFV only needed a 190-litre fuel tank, compared to the 220+ litre sized fuel tank required by a turbo engine, it meant the power to weight ratio of a McLaren MP4 or Williams FW07/08 with their specialist DFV engines were comparable to their turbocharged opponents, albeit with better fuel consumption and much less strain on the rear tyres, gearboxes and rear axle, meaning softer compounds could be used and last longer by both Williams and McLaren, which gave a significant benefit to both grip and tyre durability. As of mid-1982, 375 engines had been built. The cost of a complete engine at that time, purchased directly from Cosworth, was £27,296, approximately .


Other formulae


Sportscar racing

The DFV was used in
sportscar racing Sports car racing is a form of motorsport road racing which utilises sports cars that have two seats and enclosed wheels. They may be purpose-built prototypes or grand tourers based on road-going models. Broadly speaking, sports car racing is ...
with some modest success. The design of the crankshaft caused vibrations that resulted in reliability problems in endurance racing. In 1968, new rules for the Sports Prototype class limited engine displacement to 3 litres and Ford (UK) sponsored the DFV-powered Ford P68 as their entry under the new rules. However, this car, and its derived sister the P69, failed to finish a single race during the two seasons that they competed. In 1971 a DFV-powered
Ligier JS3 The Ligier JS3 is a sports-racing car that was built by Automobiles Ligier. It was unveiled in 1971 and ended its competition life in the same year. Only one JS3, chassis JS3-01, was ever built. The Car The design for the car was done late in 19 ...
was able to finish first and second in two short-distance events, the best DFV-powered Sports Prototype showings to date, but was only able to achieve a non-classified finish at
Le Mans Le Mans (, ) is a city in northwestern France on the Sarthe River where it meets the Huisne. Traditionally the capital of the province of Maine, it is now the capital of the Sarthe department and the seat of the Roman Catholic diocese of Le Man ...
after mechanical troubles. The next years would show that even that unsatisfactory result was beating the odds. The DFV came into wider use in 1972, when all purpose-built racers fell under the 3-litre engine limit. Eric Broadley's
Lola Lola may refer to: Places * Lolá, a or subdistrict of Panama * Lola Township, Cherokee County, Kansas, United States * Lola Prefecture, Guinea * Lola, Guinea, a town in Lola Prefecture * Lola Island, in the Solomon Islands People * Lola ...
, having previously focused on the 2-litre smaller class, designed their T280 model fitted with a Cosworth engine, which was very fast though it often failed to finish. Thirteen starts of DFV-powered vehicles at the Le Mans 24 Hours during 1972–74 yielded three finishes, two of which failed to complete 300 laps. The best result for DFV-powered vehicles at Le Mans was in
1975 It was also declared the ''International Women's Year'' by the United Nations and the European Architectural Heritage Year by the Council of Europe. Events January * January 1 - Watergate scandal (United States): John N. Mitchell, H. R. ...
, when fuel consumption rules had the field using low power tuning and slower engine speeds, which slowed the race pace and mitigated the DFV's vibration problem. The top three finishers were powered by DFVs, with the Gulf-sponsored Mirage driven by
Jacky Ickx Jacques Bernard "Jacky" Ickx (; born 1 January 1945) is a Belgian former racing driver who won the 24 Hours of Le Mans six times (second-highest of all time) and achieved eight wins and 25 podium finishes in Formula One. He greatly contributed ...
and Derek Bell finishing first. 1976 saw a slightly faster pace for the Mirage and the DFV-powered De Cadenet
Lola Lola may refer to: Places * Lolá, a or subdistrict of Panama * Lola Township, Cherokee County, Kansas, United States * Lola Prefecture, Guinea * Lola, Guinea, a town in Lola Prefecture * Lola Island, in the Solomon Islands People * Lola ...
, but they were eclipsed by the new turbocharged
Porsche 936 The Porsche 936 is a Group 6 sports prototype racing car introduced in 1975 by Porsche as a delayed successor to the 917, a five-litre Group 5 Sports Car, and the 908, a three-litre Group 6 Prototype-Sports Car, both of which were retired by ...
, driven by Ickx and
Gijs van Lennep Gijsbert van Lennep (born 16 March 1942, in Aerdenhout, North Holland) is a Dutch racing driver who competed in eight Formula One races. However his main achievements were in sports car racing. He is a member of the untitled Dutch nobility. Ca ...
, in first place. After two years with DFV-powered vehicles failing to run competitive distances, a DFV-powered Rondeau was the surprise winner in the 1980 race.
Jean Rondeau : Jean Rondeau (13 May 1946 in Le Mans, France – 27 December 1985 in Champagné, France) was a French race car driver and constructor, who won the 24 Hours of Le Mans in 1980, in a car bearing his own name, an achievement which remains unique ...
and
Jean-Pierre Jaussaud Jean-Pierre Jaussaud (3 June 1937 – 22 July 2021) was a French racing driver, noted for winning the 24 Hours of Le Mans in 1978 and 1980. Jaussaud was born in Caen, Calvados, and started racing in automobiles in 1962, taking courses in the Ji ...
nursed a two lap lead over the
Jacky Ickx Jacques Bernard "Jacky" Ickx (; born 1 January 1945) is a Belgian former racing driver who won the 24 Hours of Le Mans six times (second-highest of all time) and achieved eight wins and 25 podium finishes in Formula One. He greatly contributed ...
/
Reinhold Joest Reinhold Joest (also spelt Reinhold Jöst; born 24 April 1937) is a former German race car driver and current team owner. During the last 25 years, Joest Racing has won the 24 Hours of Le Mans fifteen times. Driving career Joest's driving career ...
Porsche 908/80 charging back from earlier mechanical setbacks. Another Rondeau occupied the third spot, nine laps behind the winner. In 1981 Rondeau slightly improved on the pace of the previous year but, as in 1976, DFV-powered vehicles were again outclassed by a Porsche 936, driven this time by the old Mirage winning team of Ickx and Bell. The 1981 distance result, 340 laps, was the best ever achieved with the DFV. The DFV faded from relevance over 1982–1984, showing just two finishes of over 300 laps from fourteen starts at Le Mans. Australian race driver Bap Romano used an ex-F1 Cosworth DFV engine (formerly used by
McLaren McLaren Racing Limited is a British motor racing team based at the McLaren Technology Centre in Woking, Surrey, England. McLaren is best known as a Formula One constructor, the second oldest active team, and the second most successful Formul ...
) in his Australian designed and built
Kaditcha Kaditcha was an automobile manufacturer in Australia. The company, formed by Queensland engineer Barry Lock, made open wheel and sports car racing cars, including cars for Formula 5000, Formula Pacific and Australian Formula 2. Sports cars The pe ...
Group A Sports Car Group A Sports Cars is an Australian motor racing category that CAMS formulated for sports car racing in Australia. Introduced in 1964, it continues today under the name Group 2A Sports Cars. On introduction in 1964, Group A catered only for close ...
through 1983 and 1984 in the
Australian Sports Car Championship The Australian Sports Car Championship was the national title for sports car racing drivers sanctioned by the Confederation of Australian Motor Sport from 1969 to 1988. Each championship was contested over a series of races with the exception of ...
s. After finishing 6th in the 1983 ASCC, winning the final round of the series, he would go on to dominate the 1984 championship. The renamed
Romano WE84 The Romano WE84 is an Australia, Australian designed and built, mid-engined closed top racing car built to Confederation of Australian Motorsport, CAMS Group A Sports Cars, Group A Sports Car specifications. The car began its life as the Kaditcha ...
won four of the five rounds and in all bar heat two of the opening round when the car was a non-starter due to an accident in the first heat, scored fastest lap while also sitting on pole for every round.The DFV in the Romano was later replaced in late 1984 by the Cosworth DFL engine.


Use of post-DFV variants

1982 saw the introduction of 3.3 and 3.9 litre DFLs, endurance racing versions of the DFV, in the
World Endurance Championship World Endurance Championship may refer to: * FIA World Endurance Championship, an auto racing series held since 2012 * World Sportscar Championship, an auto racing series which used the title World Endurance Championship from 1981 to 1985 * Endura ...
. That year, the 3.3 litre variant powered the new
Rondeau M382 The Rondeau M382 was a Group C prototype sports car, designed, developed and built by Automobiles Jean Rondeau in 1981, and used in sports car racing Sports car racing is a form of motorsport road racing which utilises sports cars that have ...
to three podium finishes with a win in the 1000 km Monza event and a strong second place standing behind Porsche in season points. The DFLs proved insufficiently reliable for C1 class racing at the 24 Hours of Le Mans, achieving only three finishes in 34 starts during 1982–1984, with none achieving 300 laps. After 1982 the DFLs were never reliable or competitive in the C1 class and finished consistently behind C2 cars at Le Mans. The 3.9 litre version was completely rejected by 1985. The last start for a DFL in the C1 class at Le Mans was in 1988. 1984 saw success for the 3.3 litre version in the fuel-restricted C2 class, where low power tuning mitigated its reliability issues, with two class wins on the World Championship circuit. The 3.3 litre DFL became the most used engine of the C2 class, achieving four class championships, five class wins at Le Mans between 1985 and 1990 and the best distance of any Cosworth engine at Le Mans, at 351 laps, in 1988. Reliability of the C2 class was still considered unsatisfactory, however, and as the 1980s ended, the issue led the FIA to seek a new formula to replace the C2 class. 1989 saw the introduction of the 3.5 litre DFZ variant as a C1 class engine. It had the honor of being the first Cosworth engine to finish ahead of the C2 winner at Le Mans, but it was an inconsistent finisher and not competitive within the C1 class. It proved a consistent finisher and winner in the FIA Cup class, the low powered replacement of the C2 class, in 1992. The 3.5 litre DFR variant yielded more consistent results as a C1 engine for the
Spice A spice is a seed, fruit, root, bark, or other plant substance primarily used for flavoring or coloring food. Spices are distinguished from herbs, which are the leaves, flowers, or stems of plants used for flavoring or as a garnish. Spices a ...
team in 1990 and the Euro Racing team in 1991, with two third-place finishes for the former, but they were never able to challenge the Peugeots, Jaguars and Sauber Mercedes for the top spot.


Formula 3000

The DFV was also the engine for which the
Formula 3000 Formula 3000 (F3000) was a type of open wheel, single seater formula racing, occupying the tier immediately below Formula One and above Formula Three. It was so named because the cars were powered by 3.0 L engines. Formula 3000 championships ...
series was created in 1985, and thus it won every race that year. The DFV and its variants continued racing in F3000 for a decade,
Pedro Lamy José Pedro Mourão Lamy Viçoso, OIH, known as Pedro Lamy (; born 20 March 1972) is a Portuguese professional racing driver currently racing in endurance races teaming up with Mathias Lauda and gentleman driver Paul Dalla Lana. He was the fir ...
taking the last win for a DFV in top-class motorsport, at Pau in 1993, its 65th F3000 win in 123 races.


Variants


DFW

The first variant produced from the DFV was a reduced-capacity unit for the
Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
and
New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...
-based
Tasman Series The Tasman Series (formally the Tasman Championship for Drivers)Tasman Championship for Drivers, CAMS Manual of Motor Sport with National Competition Rules 1974, pages 80 to 83 was a motor racing competition held annually from 1964 to 1975 ove ...
races of 1968–69. The changes between the DFV and DFW specification were limited to a reduced
stroke A stroke is a medical condition in which poor blood flow to the brain causes cell death. There are two main types of stroke: ischemic, due to lack of blood flow, and hemorrhagic, due to bleeding. Both cause parts of the brain to stop functionin ...
, taking capacity to 2491 cc and reducing power output to ~360 bhp.Robson, G. (2007) Cosworth DFV: Horses for courses. ''Motor Sport'', 83(7), 44–48. This was the smallest capacity variant of the DFV that was officially produced by Cosworth. The engine was a direct replacement for its DFV parent in Lotus's 49s. The small engine proved just as competitive as the larger version; and
Jim Clark James Clark Jr. OBE (4 March 1936 – 7 April 1968) was a British Formula One racing driver from Scotland, who won two World Championships, in 1963 and 1965. A versatile driver, he competed in sports cars, touring cars and in the Indianapol ...
took four race victories in 1968, followed by one win for
Piers Courage Piers Raymond Courage (27 May 1942 – 21 June 1970) was a British racing driver. He participated in 29 World Championship Formula One Grands Prix, debuting on 2 January 1967. He achieved two podium finishes, and scored 20 championship point ...
and two victories for
Jochen Rindt Jochen is a given name. Notable people with the name include: *Jochen Asche, East German luger, competed during the 1960s *Jochen Böhler (born 1969), German historian, specializing in the history of World War II *Jochen Babock (born 1953), East G ...
in 1969. Derek Bell drove a DFW version of the
Brabham BT26 The Repco Brabham BT26 was a Formula One racing car design. A development of the previous BT24, its Repco engines were unreliable, but following a switch to Cosworth DFV engines it scored two World Championship Grand Prix wins and finished ...
to second place in the
1970 New Zealand Grand Prix The 1970 New Zealand Grand Prix was a race held at the Pukekohe Park Raceway on 10 January 1970. The race had 20 starters. It was the 16th New Zealand Grand Prix, and doubled as the second round of the 1970 Tasman Series. Frank Matich won his f ...
, and for the 1971 Tasman Series previous champion
Chris Amon Christopher Arthur Amon (20 July 1943 – 3 August 2016) was a New Zealand motor racing driver. He was active in Formula One racing in the 1960s and 1970s, and is widely regarded as one of the best F1 drivers never to win a championship Grand ...
drove a DFW-powered version of his current Formula One chassis, the
March 701 The March 701 is a Formula One racing car model, designed by Robin Herd with Peter Wright, and built by March Engineering. The 701 was March's first Formula One design – following their one-off March 693P Formula Three prototype of 1969 – a ...
, to another podium finish, but in both years the Formula One-derived engine was largely outmatched by
Formula 5000 Formula 5000 (or F5000) was an open wheel, single seater auto-racing formula that ran in different series in various regions around the world from 1968 to 1982. It was originally intended as a low-cost series aimed at open-wheel racing cars tha ...
entrants. After the demise of the 2.5L component of the Tasman Formula following the 1971 season, the four DFW engines were converted to DFV specification.


Formula One

The DFV had three major upgrades over its life in the top formula, with the development of first the DFY and then the DFZ, followed by a major redesign to produce the final DFR type.


DFY

With the introduction of turbocharged engines towards the end of the 1970s, Cosworth's naturally aspirated DFV began to lose its predominance. In an attempt to recover some of the performance deficit Cosworth designer
Mario Illien Mario Illien (born 2 August 1949) is a Swiss engineer specialising in motorsport engine design and comes from Chur in the Canton of Graubünden, Switzerland. Despite living in a country in which motor racing was banned in 1955 (when Illien was si ...
reconfigured the cylinder aspect ratio to allow the engine to rev more freely, and combined this with a narrow-angle valve set-up and
Nikasil Nikasil is a trademarked electrodeposited lipophilic nickel matrix silicon carbide coating for engine components, mainly piston engine cylinder liners. Development Nikasil was introduced by Mahle in 1967, and initially developed to allow Wankel ...
Aluminium liners. The changes upped power output to ~520 bhp, but this was not sufficient to keep pace with the turbo cars at most tracks, and it was only through a modicum of luck that
Michele Alboreto Michele Alboreto (; 23 December 1956 – 25 April 2001) was an Italian racing driver. He was runner up to Alain Prost in the 1985 Formula One World Championship, as well as winning the 1997 24 Hours of Le Mans and 2001 12 Hours of Sebring spo ...
was able to take what would prove to be the DFV-family's final F1 victory, at the 1983 Detroit Grand Prix. The DFY lived on with back-marker teams until the end of the season, when Cosworth switched their efforts to supporting the new turbocharged Ford GBA V6.


DFZ

The announcement at end of the season that turbocharged cars would be banned from , and the introduction of the Jim Clark Cup and
Colin Chapman Trophy The 1987 FIA Formula One World Championship was the 41st season of Fédération Internationale de l'Automobile, FIA Formula One motor racing. It featured the 1987 Formula One World Championship for Drivers and the 1987 Formula One World Cha ...
championships for naturally aspirated cars for , prompted Cosworth to revive their elderly engine design. This resulted in the DFZ, essentially an updated version of the final DFY design. However, the capacity increase for the new 3.5L naturally aspirated formula running alongside the 1.5L turbos in 1987 allowed Cosworth to increase the power output of the unit to . The engine was intended as a temporary measure to tide smaller teams over until the turbos were banned at the end of the season. Tyrrell, AGS,
March March is the third month of the year in both the Julian and Gregorian calendars. It is the second of seven months to have a length of 31 days. In the Northern Hemisphere, the meteorological beginning of spring occurs on the first day of Marc ...
,
Lola Lola may refer to: Places * Lolá, a or subdistrict of Panama * Lola Township, Cherokee County, Kansas, United States * Lola Prefecture, Guinea * Lola, Guinea, a town in Lola Prefecture * Lola Island, in the Solomon Islands People * Lola ...
and Coloni chassis were all powered by Cosworth in 1987.
Jonathan Palmer Jonathan Charles Palmer (born 7 November 1956) is a British businessman and former Formula One racing driver. Before opting for a career in motor racing, Palmer trained as a physician at London's Guys Hospital. He also worked as a junior phys ...
of Tyrrell eventually won the drivers' Jim Clark Cup, and his team took the constructors' laurels in the Colin Chapman Trophy. The engine remained in service with minor teams until the end of 1988 and development saw a slight power increase to . The DFZ did not race in Formula One beyond 1988 as the general release of the DFR engine made it obsolete. The engine did however have a second brief lease of life in sportscar racing, when the FIA announced plans to transition towards using 3.5-L F1-style engines in
Group C Group C was a category of sports car racing introduced by the FIA in 1982 and continuing until 1993, with ''Group A'' for touring cars and ''Group B'' for GTs. It was designed to replace both Group 5 special production cars (closed top touri ...
in the early 1990s. In 1990
Spice Engineering Spice Engineering was a British racing team founded by driver Gordon Spice with Raymond Bellm in the early 1980s, later becoming a successful sports car constructor in 1986. They competed in the World Sportscar Championship in Europe as well as ...
adapted its existing Group C design to take a 3.5L DFZ instead of the previously used 3.3-L DFL engine. However the new engine caused significant problems due to vibration, which resulted in the breakage of components and a significant increase in running costs -
Gordon Spice Gordon Spice (18 April 1940 – 10 September 2021) was a British racing driver who competed in both sports cars and Touring Car racing in the 1960s and 1970s, before starting Spice Engineering with fellow racing driver Ray Bellm in the 1980s. ...
estimated that the DFZ-powered car was about four times more expensive to run than the DFL-engined one. The DFZ was successfully used in FIA Cup class racing in 1992, with that low-powered class being the last appearance of the DFV family in sportscar racing.


DFR

From Benetton had been operating as the works Ford team, essentially taking over the role from the now defunct
Haas Lola Team Haas (USA) Ltd., sometimes called Beatrice Haas after its major sponsor, was an American Formula One team founded by Carl Haas in 1984 after an agreement with Beatrice Foods, a US consumer products conglomerate, which competed in the Worl ...
team. With the abandonment of turbocharging it was clear that the venerable DFV/Y/Z design was nowhere near being competitive with far newer offerings from
Honda is a Japanese public multinational conglomerate manufacturer of automobiles, motorcycles, and power equipment, headquartered in Minato, Tokyo, Japan. Honda has been the world's largest motorcycle manufacturer since 1959, reaching a product ...
and
Renault Groupe Renault ( , , , also known as the Renault Group in English; legally Renault S.A.) is a French multinational automobile manufacturer established in 1899. The company produces a range of cars and vans, and in the past has manufactured ...
who were building V10 engines for 1989 and beyond, and
Ferrari Ferrari S.p.A. (; ) is an Italian luxury sports car manufacturer based in Maranello, Italy. Founded by Enzo Ferrari (1898–1988) in 1939 from the Alfa Romeo racing division as ''Auto Avio Costruzioni'', the company built its first car in ...
who were building what they knew, a V12 engine, V12 (Lamborghini entered F1 in 1989 and like Ferrari, also went down the Lamborghini V12 engine, V12 path). To counter this, drastic changes were made for the DFR of 1988. Although superficially a DFV-design, almost the only feature carried over from previous versions into the DFR was the basic 90° V8 engine architecture. The DFR became available to all customers in 1989, with the Benetton team also using this engine until the 1989 British Grand Prix. The DFR struggled on until the 1991 season finally being eclipsed by the higher revving abilities of new pneumatic valve gear engines such as the HB, and was last used in that year's Australian Grand Prix by the Footwork, Fondmetal, Larrousse and Coloni teams, nearly a quarter of a century after the DFV's first race. By the time of its demise, continued improvement had pushed the DFR power output to nearly , 60% higher than the original 1967 DFV. The DFR enjoyed success in 1988 with Benetton. The team was the best performed non-turbo team of the season finishing third in the Constructors' Championship behind Ferrari (turbo) and the all-conquering
McLaren McLaren Racing Limited is a British motor racing team based at the McLaren Technology Centre in Woking, Surrey, England. McLaren is best known as a Formula One constructor, the second oldest active team, and the second most successful Formul ...
-Honda. Thierry Boutsen recorded five podium finishes and Alessandro Nannini scored two podiums. The DFR was also the most powerful non-turbo of the season with a reported . This compared to the 590 of the DFZ and the new Judd (engine)#CV, Judd V8 with a reported . This still lagged behind the Honda and Ferrari turbos which were producing over each. The 3.5 L DFR engine was later used in the Allard J2X-C
Group C Group C was a category of sports car racing introduced by the FIA in 1982 and continuing until 1993, with ''Group A'' for touring cars and ''Group B'' for GTs. It was designed to replace both Group 5 special production cars (closed top touri ...
sports car racing, sports car, in 1992.


North American series


DFX

A 2.65-L turbocharged version of the DFV was developed privately by the Vels Parnelli Jones team for the 1976 United States Automobile Club, USAC IndyCar season, in the face of opposition from Duckworth. The Parnelli-Cosworth car took its first victory at the 1976 Pocono 500 (Indycar), Pocono 500, the fifth race of the season, driven by Al Unser. Unser and his Cosworth-powered Parnelli took two further victories before the end of the year, in Wisconsin and Phoenix, and finished the championship in fourth position. Duckworth had been a guest of the Vels Parnelli team during the Pocono victory, as Parnelli Jones and Vel Miletich wanted to establish the team as the North American distributor for the turbocharged, Indycar-specification engine. However, shortly after the maiden race victory Cosworth poached two key engineers from the Parnelli team and set up facilities in Torrance, California, to develop and market the engine themselves. Henceforth it became known as the DFX. It went on to dominate American Championship car racing, American Indy car racing in much the same way the DFV had dominated Formula One. The engine won the Indianapolis 500 ten consecutive years from 1978 until 1987, as well as winning all USAC and
CART A cart or dray (Australia and New Zealand) is a vehicle designed for transport, using two wheels and normally pulled by one or a pair of draught animals. A handcart is pulled or pushed by one or more people. It is different from the flatbed tr ...
championships between 1977 and 1987 except for one. For a brief time in the early 1980s, some of the DFX engines were Rebadging, badged as Ford Performance, Fords. The DFX powered 81 consecutive Indy car victories from 1981 to 1986, and 153 victories total. By the time it was replaced, the DFX was developing over .


DFS

In 1986 General Motors, GM financed the British Ilmor firm to build a competitor to the DFX in American Championship car racing, American Indy car racing.
Mario Illien Mario Illien (born 2 August 1949) is a Swiss engineer specialising in motorsport engine design and comes from Chur in the Canton of Graubünden, Switzerland. Despite living in a country in which motor racing was banned in 1955 (when Illien was si ...
's Ilmor, Ilmor-Chevrolet Indy V-8, which owed not a little to the DFY of five years earlier, quickly took over dominance of the sport. Ford responded by commissioning Cosworth to redesign the DFX to include a number of DFR improvements. In 1989, they introduced an updated "short Stroke (engine), stroke" version of the Indy car engine which would be referred to as the "DFS" ("S" for ''short stroke'')., and the
Nikasil Nikasil is a trademarked electrodeposited lipophilic nickel matrix silicon carbide coating for engine components, mainly piston engine cylinder liners. Development Nikasil was introduced by Mahle in 1967, and initially developed to allow Wankel ...
Aluminium liners, adopted on DFY in 1983. The engine was fielded by two teams in its first season: Kraco Racing (Bobby Rahal) and Dick Simon Racing (Arie Luyendyk), and its development was an effort to regain dominance of the sport. At 1989 Indianapolis 500, Indy, neither car qualified in the front two rows, but both started in the top ten. On race day, both drivers dropped out with engine failures. Rahal won one race in 1989 at the Meadowlands Grand Prix, Meadowlands. However, the Kraco team merged with Galles Racing, Galles at season's end, dropped the program, and switched to Chevrolets. In 1990, the factory development was continued by Scott Brayton and Dominic Dobson, but neither won any races. The engine was utilized by other CART teams in 1991–1992, and was retired after the introduction of the Ford Cosworth XB with only one victory, that being Rahal's in 1989.


DFL

In 1981 a variant of the DFV named the DFL (for ''long-distance'') was produced specifically for use in the new
Group C Group C was a category of sports car racing introduced by the FIA in 1982 and continuing until 1993, with ''Group A'' for touring cars and ''Group B'' for GTs. It was designed to replace both Group 5 special production cars (closed top touri ...
sports car racing Sports car racing is a form of motorsport road racing which utilises sports cars that have two seats and enclosed wheels. They may be purpose-built prototypes or grand tourers based on road-going models. Broadly speaking, sports car racing is ...
class. The engine was modified to larger capacity and versions, both with wider bore and longer stroke dimensions than the standard DFV. Both versions were plagued by reliability issues worse than with the DFV they were supposed to replace. The 3.3-L version powered Rondeau to the second points standing in the World Sportscar Championship season of 1982, but it was insufficiently reliable to be competitive in the longer events. Thereafter, the 3.3-L DFL in the C1 class was unsuccessful, with those who managed to actually finish invariably ending up behind C2 cars. The new fuel-restricted C Junior (C2) class in 1983 opened a niche for successful use of the 3.3-L version, where low power tuning brought its reliability to a level where it could succeed. In the C2 category it powered many privateer cars, mostly Spice Engineering, Spices and Tiga Race Cars, Tigas, to class victories around the world, including five at the 24 Hours of Le Mans between 1985 and 1990. The 3.9-L version never achieved the same success as its smaller sibling, with most users finding incurable engine vibrations and it was out of competition use by 1985. It was used to power the famous Ford Supervan and Ford Supervan 2, Supervan 2 promotional projects, as well as the Australian designed and built
Romano WE84 The Romano WE84 is an Australia, Australian designed and built, mid-engined closed top racing car built to Confederation of Australian Motorsport, CAMS Group A Sports Cars, Group A Sports Car specifications. The car began its life as the Kaditcha ...
in the
Australian Sports Car Championship The Australian Sports Car Championship was the national title for sports car racing drivers sanctioned by the Confederation of Australian Motor Sport from 1969 to 1988. Each championship was contested over a series of races with the exception of ...
, which ran the 3.0-L DFV in the championship before upgrading to the 3.9-L DFL for the 1984 World Sportscar Championship season, 1984 World Endurance Championship round at the Sandown Raceway in Melbourne, where it finished 100 laps behind the class winner. In August 1982, a turbocharged version of this engine was tested briefly on the Brands Hatch Circuit mounted on a Ford C100.


P86 750cc motorcycle engine

In 1973 Norton Motorcycle Company, Norton approached Cosworth to help build a new engine that could be used for both street and racing motorcycles. The idea was to create a 750-cc parallel-twin version of the DFV, with liquid-cooling, 4-valve head, dual overhead cams and flat combustion chambers. Expected power was to be 65–75hp for road bikes, and at least 100hp for the racing bikes. The P86 had a bore of 85.6mm and a stroke of 64.8mm, giving a capacity of 746cc. A timing belt was used to drive the cams, rather than the gear train used on the DFV. The P86 shared the same combustion chamber, head designs, pistons and rods from the DFV. Norton specified that the P86 must run through a single carburettor source, which led to a 360° firing interval, with both pistons rising and falling as a pair. As this led to increased vibration, a dual counterbalancing system was developed, in conjunction with a heavy flywheel. In an engine weighing 195lb, 75lb of that was a rotating mass inside, which was a lot of inertia to be driven. The P86 had downdraught ports like the DFV, but used two Amal carburettors, rather than the fuel injection of the DFV. The carburettors and angle in relation hampered fuel delivery and power output. Dyno testing showed that the P86 developed 90hp, down on the projected 100hp, while the massive amount of rotating weight inside the engine (counter balancers and flywheel) hindered throttle response. The overall weight of the engine meant that it was never going to be as light as equivalent engines from Japanese manufacturers. The belt driven timing system was inaccurate, while the belts themselves were fragile and prone to breaking. The P86 was fitted in a Norton 'frameless' chassis that made its racing debut in 1975, but results were poor, due to the lack of power. When Norton Villiers Triumph was split up in 1976, an offshoot company called NVT Engineering disbanded the testing and racing departments, and the existing bikes and spare engines (30 in total) were sold off. The P86 made a brief comeback 10 years later at the 1986 Battle of the Twins, held at the Daytona International Speedway. The Quantel entry featured one of the surviving P86 engines – reworked, fitted with fuel injection and bored out to 823cc. Ridden by Paul Lewis, the Quantel finished 2nd, and would win the event in 1988.


Major successes

DFV normally aspirated 3.0-litre 90° V8
Formula One Formula One (also known as Formula 1 or F1) is the highest class of international racing for open-wheel single-seater formula racing cars sanctioned by the Fédération Internationale de l'Automobile (FIA). The World Drivers' Championship, ...
Drivers' Champions (12): * 1968
Graham Hill Norman Graham Hill (15 February 1929 – 29 November 1975) was a British racing driver and team owner, who was the Formula One World Champion twice, winning in and as well as being runner up on three occasions (1963, 1964 and 1965). Despite ...
(
Team Lotus Team Lotus was the motorsport sister company of English sports car manufacturer Lotus Cars. The team ran cars in many motorsport categories including Formula One, Formula Two, Formula Ford, Formula Junior, IndyCar, and sports car racing. More ...
) * 1969
Jackie Stewart Sir John Young Stewart (born 11 June 1939), known as Jackie Stewart, is a British former Formula One racing driver from Scotland. Nicknamed the "Flying Scot", he competed in Formula One between 1965 and 1973, winning three World Drivers' Cha ...
(
Matra Matra (an acronym for Mécanique Aviation Traction) was a French industrial conglomerate. During its years of operation, it was engaged in a wide range of business activities, primarily focused around automobiles, bicycles, aeronautics and w ...
) * 1970
Jochen Rindt Jochen is a given name. Notable people with the name include: *Jochen Asche, East German luger, competed during the 1960s *Jochen Böhler (born 1969), German historian, specializing in the history of World War II *Jochen Babock (born 1953), East G ...
(
Team Lotus Team Lotus was the motorsport sister company of English sports car manufacturer Lotus Cars. The team ran cars in many motorsport categories including Formula One, Formula Two, Formula Ford, Formula Junior, IndyCar, and sports car racing. More ...
) * 1971
Jackie Stewart Sir John Young Stewart (born 11 June 1939), known as Jackie Stewart, is a British former Formula One racing driver from Scotland. Nicknamed the "Flying Scot", he competed in Formula One between 1965 and 1973, winning three World Drivers' Cha ...
( Tyrrell) * 1972 Emerson Fittipaldi (
Team Lotus Team Lotus was the motorsport sister company of English sports car manufacturer Lotus Cars. The team ran cars in many motorsport categories including Formula One, Formula Two, Formula Ford, Formula Junior, IndyCar, and sports car racing. More ...
) * 1973
Jackie Stewart Sir John Young Stewart (born 11 June 1939), known as Jackie Stewart, is a British former Formula One racing driver from Scotland. Nicknamed the "Flying Scot", he competed in Formula One between 1965 and 1973, winning three World Drivers' Cha ...
( Tyrrell) * 1974 Emerson Fittipaldi (
McLaren McLaren Racing Limited is a British motor racing team based at the McLaren Technology Centre in Woking, Surrey, England. McLaren is best known as a Formula One constructor, the second oldest active team, and the second most successful Formul ...
) * 1976 James Hunt (
McLaren McLaren Racing Limited is a British motor racing team based at the McLaren Technology Centre in Woking, Surrey, England. McLaren is best known as a Formula One constructor, the second oldest active team, and the second most successful Formul ...
) * 1978 Mario Andretti (
Team Lotus Team Lotus was the motorsport sister company of English sports car manufacturer Lotus Cars. The team ran cars in many motorsport categories including Formula One, Formula Two, Formula Ford, Formula Junior, IndyCar, and sports car racing. More ...
) * 1980 Alan Jones (Formula One), Alan Jones ( Williams) * 1981 Nelson Piquet (
Brabham Brabham () is the common name for Motor Racing Developments Ltd., a British racing car manufacturer and Formula One racing team. Founded in 1960 by Australian driver Jack Brabham and British-Australian designer Ron Tauranac, the team won four ...
) * 1982
Keke Rosberg Keijo Erik Rosberg (born 6 December 1948), known as "Keke" (), is a Finnish former racing driver and winner of the Formula One World Championship. He was the first Finnish driver to compete regularly in the series, as well as the first Finnish ...
( Williams)
Formula One Formula One (also known as Formula 1 or F1) is the highest class of international racing for open-wheel single-seater formula racing cars sanctioned by the Fédération Internationale de l'Automobile (FIA). The World Drivers' Championship, ...
Constructors' Champions (10): * 1968 Lotus * 1969 Matra * 1970 Lotus * 1971 Tyrrell * 1972 Lotus * 1973 Lotus * 1974 McLaren * 1978 Lotus * 1980 Williams * 1981 Williams Le Mans 24 Hours winners (2): * 1975
Jacky Ickx Jacques Bernard "Jacky" Ickx (; born 1 January 1945) is a Belgian former racing driver who won the 24 Hours of Le Mans six times (second-highest of all time) and achieved eight wins and 25 podium finishes in Formula One. He greatly contributed ...
/ Derek Bell (Mirage), * 1980
Jean Rondeau : Jean Rondeau (13 May 1946 in Le Mans, France – 27 December 1985 in Champagné, France) was a French race car driver and constructor, who won the 24 Hours of Le Mans in 1980, in a car bearing his own name, an achievement which remains unique ...
/
Jean-Pierre Jaussaud Jean-Pierre Jaussaud (3 June 1937 – 22 July 2021) was a French racing driver, noted for winning the 24 Hours of Le Mans in 1978 and 1980. Jaussaud was born in Caen, Calvados, and started racing in automobiles in 1962, taking courses in the Ji ...
(Rondeau)
Formula 3000 Formula 3000 (F3000) was a type of open wheel, single seater formula racing, occupying the tier immediately below Formula One and above Formula Three. It was so named because the cars were powered by 3.0 L engines. Formula 3000 championships ...
Champions (6): * 1985 Christian Danner (March Engineering) * 1986 Ivan Capelli (March Engineering) * 1987 Stefano Modena (March Engineering) * 1988 Roberto Moreno (Reynard Motorsport, Reynard) * 1992 Luca Badoer (Reynard Motorsport, Reynard) ---- DFX turbocharged 2.65-litre 90° V8 Indy 500 winners (10): * 1978 Al Unser (
Lola Lola may refer to: Places * Lolá, a or subdistrict of Panama * Lola Township, Cherokee County, Kansas, United States * Lola Prefecture, Guinea * Lola, Guinea, a town in Lola Prefecture * Lola Island, in the Solomon Islands People * Lola ...
) * 1979 Rick Mears (
Penske Penske Corporation, Inc. () is an American diversified transportation services company based in Bloomfield Township, Oakland County, Michigan. Roger Penske is the chairman of the privately held company, and Rob Kurnick is the president. Holding ...
) * 1980 Johnny Rutherford (Chaparral Cars, Chaparral) * 1981 Bobby Unser (
Penske Penske Corporation, Inc. () is an American diversified transportation services company based in Bloomfield Township, Oakland County, Michigan. Roger Penske is the chairman of the privately held company, and Rob Kurnick is the president. Holding ...
) * 1982 Gordon Johncock (Wildcat (racing car), Wildcat) * 1983 Tom Sneva (March) * 1984 Rick Mears (March) * 1985 Danny Sullivan (March) * 1986 Bobby Rahal (March) * 1987 Al Unser (March) United States Automobile Club, USAC Champions (3): * 1977 Tom Sneva (
McLaren McLaren Racing Limited is a British motor racing team based at the McLaren Technology Centre in Woking, Surrey, England. McLaren is best known as a Formula One constructor, the second oldest active team, and the second most successful Formul ...
/
Penske Penske Corporation, Inc. () is an American diversified transportation services company based in Bloomfield Township, Oakland County, Michigan. Roger Penske is the chairman of the privately held company, and Rob Kurnick is the president. Holding ...
) * 1978 Tom Sneva (
Penske Penske Corporation, Inc. () is an American diversified transportation services company based in Bloomfield Township, Oakland County, Michigan. Roger Penske is the chairman of the privately held company, and Rob Kurnick is the president. Holding ...
) * 1979 A. J. Foyt (Parnelli*)
CART A cart or dray (Australia and New Zealand) is a vehicle designed for transport, using two wheels and normally pulled by one or a pair of draught animals. A handcart is pulled or pushed by one or more people. It is different from the flatbed tr ...
Champions (9): * 1979 Rick Mears (
Penske Penske Corporation, Inc. () is an American diversified transportation services company based in Bloomfield Township, Oakland County, Michigan. Roger Penske is the chairman of the privately held company, and Rob Kurnick is the president. Holding ...
) * 1980 Johnny Rutherford (Chaparral Cars, Chaparral) * 1981 Rick Mears (
Penske Penske Corporation, Inc. () is an American diversified transportation services company based in Bloomfield Township, Oakland County, Michigan. Roger Penske is the chairman of the privately held company, and Rob Kurnick is the president. Holding ...
) * 1982 Rick Mears (
Penske Penske Corporation, Inc. () is an American diversified transportation services company based in Bloomfield Township, Oakland County, Michigan. Roger Penske is the chairman of the privately held company, and Rob Kurnick is the president. Holding ...
) * 1983 Al Unser (
Penske Penske Corporation, Inc. () is an American diversified transportation services company based in Bloomfield Township, Oakland County, Michigan. Roger Penske is the chairman of the privately held company, and Rob Kurnick is the president. Holding ...
) * 1984 Mario Andretti (
Lola Lola may refer to: Places * Lolá, a or subdistrict of Panama * Lola Township, Cherokee County, Kansas, United States * Lola Prefecture, Guinea * Lola, Guinea, a town in Lola Prefecture * Lola Island, in the Solomon Islands People * Lola ...
) * 1985 Al Unser (March) * 1986 Bobby Rahal (March) * 1987 Bobby Rahal (
Lola Lola may refer to: Places * Lolá, a or subdistrict of Panama * Lola Township, Cherokee County, Kansas, United States * Lola Prefecture, Guinea * Lola, Guinea, a town in Lola Prefecture * Lola Island, in the Solomon Islands People * Lola ...
)


Partial Formula One Championship results

(:Template:Motorsport driver results legend, key) (Races in bold indicate pole position) (Races in ''italics'' indicate fastest lap)


References


External links

* Darren Galpin. (June 22, 1999
Customer power: the Cosworth DFV story
''8W''. {{DEFAULTSORT:Cosworth Dfv Formula One engines World Sportscar Championship engines V8 engines Ford engines Cosworth