The 1998 Jaguar XJ is a full-size luxury sports sedan which seats five very comfortably in its well-equipped interior space. The XJ is available in multiple trims which all feature a 4.0L V8 engine. Also available is 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. The supercharged version bumps output to an impressive 370 hp. Both versions are linked to a five-speed automatic transmission.