The XJ is best described as a race-bred luxury sedan. Available with a long or short wheelbase chassis, the base trim (the only all-wheel drive model in the family) relies on a supercharged 340-hp V6. For those hooked on British luxury and higher performance, supercharged V8 versions are available, producing either 470 horsepower or 550 horsepower in the R trim. Regardless of powertrain, all come with the eight-speed automatic gearbox.