Renowned for performance and luxury, British automaker Jaguar continues to promote itself with an XJ sedan and XK8 grand tourer for 1998. The era of the XJ6 has ended in 1998. An inline-six cylinder engine is no longer available on Jaguar's flagship sedan as the 1998 XJ has now embraced V-8 power across all trim levels. The 4.0-liter V-8 delivers 290 horsepower for the base XJ while the performance-oriented XJR's output is rated at 370 horsepower. Eight-cylinder power for the 1998 Jaguar XJ is matched with a new five-speed automatic transmission. Receiving a massive re-engineering in 1997, the Jaguar XK8 changes for the 1998 model year are modest. An engine immobilizer provides a new layer of theft deterrence for the 1998 XK8 and the steering wheel incorporates multi-function controls.