The XJR-8 was a race car built by Jaguar for campaigning in the World Sportscar Championship and the 24 Hours of Le Mans as part of Group C. It was used during the 1987 season.

In the 1980s racing expert Tom Walkinshaw and designer Tony Southgate, with support from the Jaguar company and a sponsor, Silk Cut,[2] designed a car based on the Jaguar V12 to compete in the ultra-high performance Le Mans Group C class and the North American-based IMSA GT Championship in competition with Porsche and Mercedes.

Though it was what people believed to be a standard Jaguar V12 the displacement was increased to 7 litres and the power was cranked up to 720 horsepower (540 kW).

Jaguar won both the driver's title and the overall championship (8 total victories in 10 races) with Porsche and its vaunted 962 finishing 2nd.

The surviving car, which was in 2nd place at one point after 18 hours of racing, experienced gearbox trouble and finished 5th.