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An evolution of the 1964 DOHC prototype “XJ13” engine, the Jaguar V12 engine is a family of SOHC internal combustion V12 engines with a common block design, that were mass-produced by Jaguar Cars for a quarter of a century, from 1971 to 1997, mostly as 5.3‑litres, but later also as 6‑litres, and 7‑litre versions that were deployed in racing.
The Jaguar XJR-12 is a sports-prototype race car built by the Jaguar Cars-backed Tom Walkinshaw Racing team for both Group C and IMSA Camel GTP.The XJR-12 is famous for winning the 1990 24 Hours of Le Mans race.
The Jaguar XJR-12 had been given aerodynamic changes by engineer Alastair McQueen and bigger brakes fitted. Given that they had won in 1990 with fuel left over, TWR's engine-specialist, Allan Scott enhanced the 24-valve V12, boring it out to 7.4-litres and increasing the torque.
Jaguar first appeared in September 1935 as a model name on an SS 2½-litre sports saloon. [12] [13] A matching open two seater sports model with a 3½-litre engine was named SS Jaguar 100. On 23 March 1945, the S. S. Cars shareholders in general meeting agreed to change the company's name to Jaguar Cars Limited.
Tony Southgate, designer of Jaguar's Le Mans-winning XJR-12, was brought on board as project co-ordinator. The car was built around the completely new 3.5-litre RV10 engine . The all-aluminium block had a 72° V10 with two valves per cylinder and could develop 660 and was fitted to a 6-speed gearbox.
The Jaguar XJ is a series of mid-size/full-size luxury cars produced by British automobile manufacturer Jaguar Cars (becoming Jaguar Land Rover in 2013) from 1968 to 2019. It was produced across four basic platform generations (debuting in 1968, 1986, 2003, and 2009) with various updated derivatives of each.
The XJR-12 was short-lived, as in 1991, Jaguar decided to debut their new 3.5L naturally aspirated V8 engine by Cosworth for the XJR-14. After having won multiple championships in the WSC, and instability due to multiple rule changes, Jaguar decided to drop out following the 1991 season and concentrate on IMSA.
In later years, Le Mans-winning Jaguars were powered with a modified V12 racing engine. A 7.0-litre V12 based on the production 5.3-litre engine powered the winning Jaguar XJR-9 in June 1988. A Jaguar XJR-12 powered by a 7-litre 60 degree SOHC V12 won in June 1990. During that race it covered 4882.4 km at an average speed of 204.036 km/h / 126. ...