The capable, luxurious XJ has graceful, nimble handling and a supple, steady ride. Its 470-hp V8 makes the big sedan very quick, but most versions have the supercharged V6 with all-wheel drive. The plush, quiet interior is crafted with genuine wood trim, copious amounts of leather, and abundant chrome details. But certain controls are confusing. The complex touch screen for the climate, audio, and navigation systems responds slowly and takes some getting used to. Our tested long-wheelbase XJL has a sumptuous backseat, but the low roofline impedes head room and access, and the trunk is small. A new infotainment system and a more generous five-year/60,000-mile warranty are recent upgrades.