A full-size luxury sedan, the 1999 Jaguar XJ features a sporty drive characteristic mixed with classic style and interior comfort. The XJ is available in multiple trims which all come very well equipped with upscale amenities. There is also an extended wheelbase version for four more inches of rear seat leg room. The standard engine in the XJ is a 4.0L V8 which produces 290 hp. There is a supercharged version offered which bumps output to an impressive 370 hp.