ZF 4HP18 Transmission
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ZF 4HP18 Transmission
The ZF 4HP18 is a four-speed automatic transmission for passenger cars from ZF Friedrichshafen AG. Introduced in 1987, and produced through 1998, it was used in a variety of cars from Alfa Romeo, Audi, Citroën, Dodge, Eagle, Fiat, Lancia, and Saab. Specifications Technical data Applications 4HP18FL front wheel drive longitudinal engine *1988–1992 Renault 25 V6 2.8 *1988–1992 Eagle Premier/Dodge Monaco V6 3.0 4HP18FLA (Audi Quattro 4x4) Audi version: longitudinal engine, quattro four-wheel drive *1992–1994 Audi S4 (C4) 5-cyl 2.2 Turbo *1992–1994 Audi 100 (C4) CS 2.8 V6 *1995–1997 Audi A6 (C4) quattro 2.8 V6 *1995–1997 Audi S6 (C4) quattro 5-cyl 2.2 Turbo 4HP18FLE (Audi FWD) longitudinal engine (non-quattro) *1991–1994 Porsche 968 4-cyl 3.0 *1992–1993 Audi 100 2.8 V6 *1992–1994 Audi 100 CS 2.8 V6 *1992–1994 Audi 100 S 2.8 V6 *1995–1997 Audi A6 2.8 V6 *1995–1997 Audi A6 2.5 TDI (AEL) (AAT) 4HP18Q fr ...
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Automatic Transmission
An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in internal combustion engine-based motor vehicles that does not require any input from the driver to change forward gears under normal driving conditions. It typically includes a transmission, axle, and differential in one integrated assembly, thus technically becoming a transaxle. The most common type of automatic transmission is the hydraulic automatic, which uses a planetary gearset, hydraulic controls, and a torque converter. Other types of automatic transmissions include continuously variable transmissions (CVT), automated manual transmissions (AMT), and dual-clutch transmissions (DCT). An electronic automatic transmission (EAT) may also be called an electronically controlled transmission (ECT), or electronic automatic transaxle (EATX). A hydraulic automatic transmission may also colloquially called a " slushbox" or simply a "torque converter", although the latter term c ...
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Quattro (four Wheel Drive System)
quattro (meaning ''four'' in Italian language, Italian) is the trademark used by the Automotive industry, automotive brand Audi to indicate that all-wheel drive (AWD) technologies or systems are used on specific models of its automobiles.Audi.com - Glossarquattro The word "quattro" is a registered trademark of Audi AG, a subsidiary of the Germany, German automotive concern, Volkswagen Group. Quattro was first introduced in 1980 on the permanent four-wheel drive Audi Quattro model, often referred to as the ''wiktionary:Ur, Ur-Quattro'' (meaning "original" or "first"). The term quattro has since been applied to all subsequent Audi AWD models. Due to the nomenclature rights derived from the trademark, the word quattro is now always spelled with a lower case "q", in honour of its former namesake. Other companies in the Volkswagen Group have used different trademarks for their 4WD vehicles. While Audi has always used the term "quattro", Volkswagen-branded cars initially used ''" ...
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Citroën XM
The Citroën XM is a front-engine, front-drive, five-passenger, five-door hatchback noted for its hydropneumatic suspension. Manufactured and marketed by Citroën from 1989 to 2000, with a minor facelift in 1994, XM production reached 333,405 over the course of 11 years. The XM was voted 1990 European Car of the Year. History Launched on 23 May 1989, the XM was the company's flagship saloon, replacing the Citroën CX. It went on sale in its native France immediately afterwards, and was available in right-hand drive on the UK market from October 1989. The CX remained in production until the spring of 1991, when the XM Estate launched. The XM did not enjoy the commercial success of its predecessors, the CX and the DS, which each raised the bar of automotive performance for other manufacturers. Total sales of the XM reached 330,000 in 11 years, and the XM's replacement, the Citroën C6, was launched at the end of 2005. By the second half of the 1990s, sales were in sharp decl ...
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Alfa Romeo 164
The Alfa Romeo 164 (Type 164) is a four-door executive saloon manufactured and marketed by Italian automaker Alfa Romeo from 1987-1998, styled by Pininfarina, and cooperatively designed and sharing platforms and numerous elements with the Fiat Croma, Saab 9000 and Lancia Thema. The predecessors of the 164 were the Alfa 90 and the luxurious Alfa 6. The 164 was superseded by the 166 in 1998, after a combined production total of 273,857 units. Development In October 1978, Alfa Romeo, Fiat, Lancia and Saab jointly agreed to each develop an executive saloon based on their shared Type Four platform (''"Tipo 4"'' in Italian), to eventually compete against the likes of the Ford Granada and Opel Rekord (Vauxhall Carlton) as well as more premium saloons by BMW and Mercedes-Benz in the form of the 5 Series and E-Class, respectively. Project 164 started life as ''Project 156'' (not to be confused with Alfa Romeo 156) and was completed in 1981, then still under Alfa Romeo. A year late ...
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Saab 9000
The Saab 9000 is an automobile produced by the Swedish company Saab from 1984 to 1998. Representing the company's foray into the executive car scene, it was developed as a result of the successes of the turbocharged 99 and 900 models. The 9000 remained in production until May 1998 and it was replaced by the Saab 9-5 in late 1997, although some final cars were produced into 1998. The Saab 9000 was only available with petrol engines, as 5-door hatchback or 4-door notchback and never as a convertible (except for one prototype) or a Coupé. Saab designed the 9000 as part of the Type Four platform in conjunction with the Italian automaker Fiat Automobiles. Fiat retailed similar derivative versions as the more basic Fiat Croma, the luxury-themed Lancia Thema, and the sports-oriented Alfa Romeo 164. Unlike the 164, which shares only the chassis, the Croma and Thema are outwardly similar to the 9000. As such, much of the bodywork appeared interchangeable between the 9000, Croma and Thema; ...
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Fiat 2500
Fiat Automobiles S.p.A. (, , ; originally FIAT, it, Fabbrica Italiana Automobili di Torino, lit=Italian Automobiles Factory of Turin) is an Italian automobile manufacturer, formerly part of Fiat Chrysler Automobiles, and since 2021 a subsidiary of Stellantis through its Italian division Stellantis Italy. Fiat Automobiles was formed in January 2007 when Fiat S.p.A. reorganized its automobile business, and traces its history back to 1899 when the first Fiat automobile, the Fiat 4 HP, was produced. Fiat Automobiles is the largest automobile manufacturer in Italy. During its more than century-long history, it remained the largest automobile manufacturer in Europe and the third in the world after General Motors and Ford for over 20 years, until the car industry crisis in the late 1980s. In 2013, Fiat S.p.A. was the second largest European automaker by volumes produced and the seventh in the world, while FCA was the world's eighth-largest automaker. In 1970, Fiat Automobiles emplo ...
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Fiat 2000
The Fiat 2000 was an Italian heavy tank designed and produced by Fiat during World War I. Only two were built as it never entered serial production. It was one of the largest designs of its time. History During World War I, Italy did not field any armoured units, due to a lack of tanks. The only solution at the time was to begin production of original designs. The order to design and produce the first Italian tanks was accepted by the FIAT automobile company in 1916. The prototype of the new tank was displayed to a military commission on 21 June 1917; its mechanical systems were complete but its superstructure was added later, being represented on the prototype by a wooden mockup with a conical open turret and dummy gun. The final configuration of the superstructure was not completed until 1918. Description The FIAT 2000 was a substantial vehicle, of comparable dimensions to the British Mark V tanks, and weighing 40 tons as compared to the Mark V's 28 tons. The driver was seated ...
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Transverse Engine
A transverse engine is an engine mounted in a vehicle so that the engine's crankshaft axis is perpendicular to the direction of travel. Many modern front-wheel drive vehicles use this engine mounting configuration. Most rear-wheel drive vehicles use a longitudinal engine configuration, where the engine's crankshaft axis is parallel with the direction of travel, except for some Mid-engine design, rear-mid engine vehicles, which use a transverse engine and transaxle mounted in the rear instead of the front. Despite typically being used in light vehicles, it is not restricted to such designs and has also been used on Armoured fighting vehicle, armoured fighting vehicles to save interior space. History The Critchley Light car, Critchley light car, made by the Daimler Company, Daimler Motor Company in 1899, had a transverse engine with belt drive to the rear axle. The first successful transverse-engine cars were the two-cylinder DKW F1 series of cars, which first appeared in 1931. Du ...
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Porsche 968
The Porsche 968 is a sports car manufactured by German automobile manufacturer Porsche AG from 1991 until 1995. It was the final evolution of a series of water-cooled front-engine rear wheel drive models begun almost 20 years earlier with the 924, taking over the entry-level position in the company lineup from the 944 with which it shared about 20% of its parts. The 968 was Porsche's last new front-engined vehicle before the introduction of the Cayenne SUV in 2003. History Porsche's 944 model debuted for the 1982 model year as an evolution of the 924, was updated as "944S" in 1987 and as "944S2" in 1989. Porsche was in significant financial crisis at the time with less interest in its sports cars from customers, especially in the US. The virtually unchanged design of the 944, which was derived from the 924, was showing its age and sales of the model declined. Porsche hence found the need to develop a new entry level model. Shortly after the start of production of the S2 varia ...
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Longitudinal Engine (non-quattro)
In automotive engineering, a longitudinal engine is an internal combustion engine in which the crankshaft is oriented along the long axis of the vehicle, from front to back. Use This type of motor is usually used for rear-wheel drive cars, except for some Audi, SAAB, the Oldsmobile Toronado, and the 1967 Cadillac Eldorado equipped with longitudinal engines in front wheel drive. In front-wheel drive cars a transverse engine is usually used. Trucks often have longitudinal engines with rear-wheel drive. For motorcycles, the use of a particular type depends on the drive: in the case of a chain or belt drive a transverse engine is usually used, and with shaft drives a longitudinal engine. Longitudinal engines in motorcycles do have one disadvantage: the "tipping point" of the crankshaft tilts along the entire motorcycle to a greater or lesser degree when accelerating. This is partly resolved by having other components, such as the generator and the gearbox, rotate in the opposite ...
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Audi S6
The Audi S6 is the performance variant of the Audi A6, an executive car produced by German automaker Audi. It went on sale in 1994, shortly after the "A6" designation was introduced, replacing the " 100" nameplate. The original S6 was largely the same car as the outgoing, original Audi S4 (C4) (''Ur-S4''), with the only visible differences being new body-cladding and badging. In certain markets where the even-higher performance RS6 (which is also based on the A6) is not sold, the S6 is the most powerful A6 trim there. The S6, like all Audi "S" models, is fitted as standard with Audi's trademark quattro four-wheel drive (4WD) system, the S6 using the Torsen-based permanent 4WD. __TOC__ C4 (''Typ'' 4A, 1994–1997) Audi was restructuring their model lineup in early and mid-1990s, and in late 1994, began selling the fifth generation (C4) Audi 100 model, re-badged as the Audi A6. Wanting to keep a sports-saloon in their lineup, the company made small revisions to what was pr ...
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Audi A6
The Audi A6 is an executive car made by the German automaker Audi. Now in its fifth generation, the successor to the Audi 100 is manufactured in Neckarsulm, Germany, and is available in saloon and estate configurations, the latter marketed by Audi as the ''Avant''. Audi's internal numbering treats the A6 as a continuation of the Audi 100 lineage, with the initial A6 designated as a member of the C4-series, followed by the C5, C6, C7, and the C8. The related Audi A7 is essentially a Sportback (liftback) version of the C7-series and C8-series A6 but is marketed under its own separate identity and model designation. All generations of the A6 have offered either front-wheel-drive or Torsen-based four-wheel-drive, marketed by Audi as their '' quattro'' system. The A6 has also been used as the basis for the company's Allroad models since 1999. Both petrol and diesel versions of the A6 are offered. The wide range of engines available have power outputs ranging from . These are inline f ...
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