The seventh generation of Jaguars rear-wheel-drive luxury sedan was originally unveiled in concept form at the Paris Motor Show in September 2002. The 2004 XJ is longer taller and wider and rides a longer wheelbase than its predecessor. The new XJ delivers greater headroom legroom and shoulder room in all seating positions. New aluminum-intensive construction promises high strength robustness and dynamic ability. Even though the new XJ is 60 percent stiffer than its predecessor its bodyshell is about 40 percent lighter than an equivalent steel body. Its curb weight is about 440 pounds less than the prior XJ. The body structure features rivet-bonded joining technology with self-piercing rivets and aerospace-sourced epoxy adhesive which Jaguar claims is an industry first for a mass-produced automobile. Advanced technologies include Dynamic Stability Control Jaguars Adaptive Restraint Technology System and Adaptive