The Jaguar XJR-6 is a Group C sports prototype race car, designed, developed and built by TWR, with the aim of competing, from 1985, in the World Sportscar Championship.

Designer Tony Southgate drew on his work with the Ford C100 and came up with a revolutionary (for Group C) carbon-fibre monocoque incorporating ground-effect venturi.

[3] Power came from the Jaguar V12 engine, enlarged to 6.2 litres and fitted with a TWR/Zytec fuel-injection system which developed 660 bhp.

The car was named in the same style, and in numerical succession to Bob Tullius' Group 44 IMSA GTP Jaguars, although there was no connection between the two teams.

[5] In 1986, with the team now sponsored by Silk Cut cigarettes and having undergone a major weight loss programme, a full season's campaign was carried out, with the best result being a win at Silverstone for Eddie Cheever and Derek Warwick.