The 2003 Jaguar XJ is available as a 4-door, 5-seat sedan. Starting at $79,330, the 2003 Jaguar XJ Super V8 is powered by a 4.0L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway. The top of the line 2003JaguarXJXJ Sport , priced at $ 59,330 , is powered by a 4.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 24-mpg on the highway.