 To cater to the limousine market, all XJ models are offered with a longer wheelbase (LWB) as an option, which increases the rear legroom.Jaguar began producing R models in 1995 with the introduction of the first XJR, and the first XKR was introduced in 1997.Jaguar R, R-S and SVR models are designated to compete with the likes of Mercedes-AMG, BMW M and Audi S and RS.