The 2000 Jaguar XJ is a full-size luxury sedan that offers a sporting 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 more 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. Even with all of its power and weight, the XJ is still rated at over 20 mpg on the highway.