The 2009 Jaguar XJ is available as a 4-door, 5-seat sedan. Starting at $65,700, the 2009 Jaguar XJ XJ8 is powered by a 4.2L, 8-cylinder engine mated to anautomatic transmission that returns an EPA estimated 16-mpg in the city and 25-mpg on the highway. The top of the line 2009 Jaguar XJ Vanden Plas, priced at $76,075, is powered by a 4.2L, 8-cylinder engine mated to anautomatic transmission that returns an EPA estimated 16-mpg in the city and 25-mpg on the highway.