The 2000 Jaguar XJ8 is available as a 4-door, 5-seat sedan. Starting at $55,950, the 2000 Jaguar XJ8 Base 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. The top of the line 2000JaguarXJ8Vanden Plas Supercharged , priced at $ 80,950 , 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 21-mpg on the highway.