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Jaguar V12 engine

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Jaguar's V12 was one of the premiere powerplants of the 1970s and 1980s. It was a V12 piston engine, The engine first seen in the Series 3 E-type of 1971 was based loosely on an earlier design intended for a Le Mans car, the ill-fated Jaguar XJ13. The V12 was only Jaguar's second engine design to go into production in the history of the company. It had a SOHC 2-valve head with flat combustion chambers.

Contents

5.3

The original 5.3 L (5343 cc) version had an oversquare 90 mm bore and 70 mm stroke. It produced 210 kW (285 hp) (245 to 299 bhp depending on emission controls and compression ratio) and 400Nm (295 ft·lbf) in fuel-injected form.

This version was used in the following cars:

5.3 HE

A High-Efficiency 5.3 HE debuted in 1982. This version of the engine used the 'May' cylinder head, and had an unusually high compression ratio (11.0:1 - 12.5:1 depending on market and year). In any given market, power levels remained similar to the previous model, but fuel economy was up by nearly 50%.

The 5.3 HE was used in these cars:

6.0 HE

The engine was stroked to 78.5 mm in 1992 for a displacement of 6.0 L (5994 cc) to make this the most powerful Jaguar production engine to date.

The 6.0 HE was used in the following cars:

TWR/Lister

In 1985, Tom Walkinshaw Racing became Jaguar's official team in World Endurance Championship, taking over the project from American team Group 44. Their first car, XJR6, used the 6.0 L engine, but in the following year the engine was upgraded to 6.9 L and in 1988 the XJR9 used the engine's most famous displacement of 7.0 L. By 1991, the V12 was good for 7.4 L inside the XJR12, developing an impressive 750 bhp.

TWR also upgraded production Jaguar cars (usually XJ-S), with a variety of styling, handling and performance modifications. Most of the cars thus modified were straight from the Jaguar factory and sold through Jaguar dealerships. By 1989, TWR were selling moderate numbers of XJ-S fitted with a 6.0 litre version of the V12, which pre-dated the Jaguar production version by some 3 years.

Lister Cars, a well-known Jaguar tuner with a long history of technical collaboration with the British automaker, was the first to use the TWR-tuned engine in a road car. In 1991, they fitted the 7.0 L (6996 cc/427 in³) version of the engine, with a 94 mm (3.7 in) bore and 84 mm (3.3 in) stroke, into a modified Jaguar XJS, which was rebadged Lister Le Mans. This engine officially produced 407.2 kW (546 hp) and 786.37 N·m (580 ft·lbf). From 1993, Lister owner Laurence Pearce produced the company's first design the Lister Storm, which, naturally, continued using the V12 engine, both on the road and on the track, with the car becoming a mainstay of the FIA GT Championship and several national championships for the following decade.

See also


A subsidiary of Ford (since 1989) Jaguar Cars road and race car timeline, 1945-present [[http://encycl.opentopia.com/ edit]]
Type 1940s 1950s 1960s 1970s 1980s 1990s 2000s
5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9
Sports XK120 XK140 XK150 E-type S1 E S2 E-type S3 XJ-S XJ-S HE XJS XK8, XKR XK
Saloon Mark 1 Mark 2, 240, 340 X-Type
S-Type XJ-C S-Type, S-Type R
420 XJ6 Ser I XJ6 Ser II XJ6 Ser III XJ6 (XJ40) XJ6 XJ8, XJR XJ8, XJR
Mk IV Mk V Mk VII Mk VIII Mk IX Mk X 420G XJ12 XJ12 S II XJ12 Ser III XJ12 XJ12
Supercar XKSS 15 XJ220
Racing C-Type D-Type E-Type XJ13 XJ-C XJR-5/6/7/8/9/10/12/14 C R1/2/3/4/5
Corporate Ownership Independent BMH British Leyland Indep- endent Ford

 

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