The XJ is built on a light and strong all-aluminum structure. Two engine options are available: a 300 hp 4.2-liter V-8, or a 400 hp 4.2-liter supercharged V-8. Both engines send power through a six-speed automatic transmission. Adding to the road handling abilities and luxurious ride is an adjustable air suspension. Safety features include dual front airbags, side curtain airbags, and front side-impact airbags. Antilock brakes, traction control, and electronic stability control are also standard. For 2008, the Jaguar XJ receives a slight exterior redesign.