The 2006 Jaguar XKR is available as a 2-door, 4-seat coupe. Starting at $87,330, the 2006 Jaguar XKR Convertible is powered by a 4.2L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 24-mpg on the highway. The top of the line 2006 Jaguar XKR Coupe, priced at $82,330, is powered by a 4.2L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 24-mpg on the highway.