The Lamborghini V8 is a ninety

degree Degree may refer to: As a unit of measurement * Degree (angle), a unit of angle measurement ** Degree of geographical latitude ** Degree of geographical longitude * Degree symbol (°), a notation used in science, engineering, and mathematics ...

(90°) V8

petrol engine A petrol engine (gasoline engine in American English) is an internal combustion engine designed to run on petrol (gasoline). Petrol engines can often be adapted to also run on fuels such as liquefied petroleum gas and ethanol blends (such as ''E ...

Lamborghini Automobili Lamborghini S.p.A. () is an Italian brand and manufacturer of luxury sports cars and SUVs based in Sant'Agata Bolognese. The company is owned by the Volkswagen Group through its subsidiary Audi. Ferruccio Lamborghini (1916–1993) ...

in the 1970s for their less-expensive vehicles.Lamborghini Urraco & the V8s Urraco, Bravo, Silhouette, Athon, Jalpa. Jean-Francois Marchet, Osprey autohistory, 1983 It was only the second

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 ...

ever developed by the company, and first saw production for the 1971

Lamborghini Urraco The Lamborghini Urraco is a 2+2 sports car manufactured by Italian automaker Lamborghini, introduced at the Turin Auto Show in 1970, marketed for model years 1972-1979, and named after a line of Miura-bred fighting bulls; the name translates t ...

. It was designed by

Gian Paolo Dallara Gian Paolo Dallara (born 16 November 1936) is an Italian businessman and motorsports engineer. He is the owner of Dallara Motorsports, a company that develops racing cars. Biography Dallara was born in Parma. Automotive and motorsport He g ...

. The all-

aluminium alloy An aluminium alloy (or aluminum alloy; see spelling differences) is an alloy in which aluminium (Al) is the predominant metal. The typical alloying elements are copper, magnesium, manganese, silicon, tin, nickel and zinc. There are two principal ...

engine was introduced as a 2.5-litre variant, displacing , but was expanded, by increasing the

piston stroke In the context of an internal combustion engine, the term stroke has the following related meanings: * A phase of the engine's cycle (e.g. compression stroke, exhaust stroke), during which the piston travels from top to bottom or vice versa. * Th ...

to a 3.0-litre variant for 1975 - now displacing . A 2.0-litre reduced-stroke version was also introduced in 1975 for sale in

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...

, displacing , because of Italian legislation which imposed punitive taxes on cars whose engines displaced more than 2.0 litres. This V8 engine was also used in two other models, the

Lamborghini Silhouette The Lamborghini Silhouette P300 is a two-door two-seat mid-engined rear-wheel drive sports car, that was made in small numbers by Lamborghini between 1976 and 1979. Officially presented at the 1976 Geneva Auto Show, the Silhouette began as a sty ...

in 1976–1977 in which it kept the 3.0-litre displacement, and the slightly updated replacement in 1982, the

Lamborghini Jalpa The Lamborghini Jalpa () is a sports car produced by the Italian automotive manufacturer Lamborghini from 1981 until 1988. It debuted at the 1981 Geneva Motor Show alongside the Lamborghini LM001 concept off-road vehicle. The Jalpa was the last L ...

, which saw the engine increased in size to 3.5 litres, displacing , for ease in meeting ever-tighter emissions requirements.

Specifications

;

engine configuration The engine configuration describes the fundamental operating principles by which internal combustion engines are categorized. Piston engines are often categorized by their cylinder layout, valves and camshafts. Wankel engines are often categorize ...

: 90°

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 ...

;

wet sump Within piston engines, a wet sump is part of a lubrication system whereby the crankcase sump is used as an integral oil reservoir. An alternative system is the dry sump, whereby oil is pumped from a shallow sump into an external reservoir.Wet sum ...

lubrication Lubrication is the process or technique of using a lubricant to reduce friction and wear and tear in a contact between two surfaces. The study of lubrication is a discipline in the field of tribology. Lubrication mechanisms such as fluid-lubric ...

system ;

engine displacement Engine displacement is the measure of the cylinder volume swept by all of the pistons of a piston engine, excluding the combustion chambers. It is commonly used as an expression of an engine's size, and by extension as a loose indicator of the ...

etc. :2.0: ; bore x

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 ...

: (

stroke ratio In a reciprocating piston engine, the stroke ratio, defined by either bore/stroke ratio or stroke/bore ratio, is a term to describe the ratio between cylinder bore diameter and piston stroke length. This can be used for either an internal com ...

: 1.46:1 - oversquare/short-stroke), per

cylinder A cylinder (from ) has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. In elementary geometry, it is considered a prism with a circle as its base. A cylinder may also be defined as an infin ...

:2.5: ; bore x stroke: (stroke ratio: 1.62:1 - oversquare/short-stroke), per cylinder :3.0: ; bore x stroke: (stroke ratio: 1.58:1 - oversquare/short-stroke), per cylinder :3.5: ; bore x stroke: (stroke ratio: 1.15:1 - oversquare/short-stroke), per cylinder ;

cylinder block In an internal combustion engine, the engine block is the structure which contains the cylinders and other components. In an early automotive engine, the engine block consisted of just the cylinder block, to which a separate crankcase was attac ...

and

crankcase In a piston engine, the crankcase is the housing that surrounds the crankshaft. In most modern engines, the crankcase is integrated into the engine block. Two-stroke engines typically use a crankcase-compression design, resulting in the fuel/a ...

cast Cast may refer to: Music * Cast (band), an English alternative rock band * Cast (Mexican band), a progressive Mexican rock band * The Cast, a Scottish musical duo: Mairi Campbell and Dave Francis * ''Cast'', a 2012 album by Trespassers William * ...

;

cylinder head In an internal combustion engine, the cylinder head (often abbreviated to simply "head") sits above the cylinders and forms the roof of the combustion chamber. In sidevalve engines, the head is a simple sheet of metal; whereas in more modern ov ...

s and

valvetrain A valvetrain or valve train is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. The intake valves control the flow of air/fuel mixture (or air alone for direct-injected engines) ...

:2.0/2.5: cast aluminium alloy, two

valves A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings ...

per cylinder, 16 valves total,

belt Belt may refer to: Apparel * Belt (clothing), a leather or fabric band worn around the waist * Championship belt, a type of trophy used primarily in combat sports * Colored belts, such as a black belt or red belt, worn by martial arts practit ...

driven single overhead camshafts :3.0/3.5: cast aluminium alloy, two valves per cylinder, 16 valves total,

chain A chain is a serial assembly of connected pieces, called links, typically made of metal, with an overall character similar to that of a rope in that it is flexible and curved in compression but linear, rigid, and load-bearing in tension. A c ...

driven double overhead camshafts ;aspiration: Naturally aspirated ;fuel system: 2.0: 4 twin-barrel down-draught Weber 40 IDF 1 carburettors : 2.5: 4 twin-barrel down-draught Weber 40 IDF 1 or

Solex Solex may refer to: * Solex (musician), Dutch musician * Solex Carburetor, a French manufacturer of carburetors and the powered bicycle VéloSoleX * Solex College, a former private for-profit college in Chicago, Illinois * Solex Unit, a fictiona ...

C40P117 carburettors : 3.0: 4 twin-barrel down-draught Weber 40 DCNF carburetors : 3.5: 4 twin-barrel down-draught Weber 42 DCNF carburetors ;

ignition system An ignition system generates a spark or heats an electrode to a high temperature to ignite a fuel-air mixture in spark ignition internal combustion engines, oil-fired and gas-fired boilers, rocket engines, etc. The widest application for spark ig ...

and engine management: 2 Magnetti Marelli coils and 1 Marelli Distributor S127E ;

exhaust system An exhaust system is used to guide reaction exhaust gases away from a controlled combustion inside an engine or stove. The entire system conveys burnt gases from the engine and includes one or more exhaust pipes. Depending on the overall system ...

: ???? ;2.0 rated motive

power Power most often refers to: * Power (physics), meaning "rate of doing work" ** Engine power, the power put out by an engine ** Electric power * Power (social and political), the ability to influence people or events ** Abusive power Power may a ...

torque In physics and mechanics, torque is the rotational equivalent of linear force. It is also referred to as the moment of force (also abbreviated to moment). It represents the capability of a force to produce change in the rotational motion of th ...

outputs and applications: @ 7,800

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

; —

;2.5 rated motive

outputs and applications : @ 7,500 rpm; —

;3.0 rated motive

outputs and applications: @ 5,750 rpm : @ 7,500 rpm; —

: @ 7,500 rpm; —

: @ 7,800 rpm; —

;3.5 rated motive

outputs and applications: @ 7,000 rpm; —

References

External links

Lamborghini.com
official website {{Lamborghini road car timeline 1980 to date V 8 Gasoline engines by model V8 engines