The 2004 Jaguar XJR is a supercharged 4.2‑liter V8 luxury sports sedan that blends classic British elegance with serious performance, delivering 390–400 hp and 399–408 lb‑ft of torque for a 0–60 mph time of about 5.1–5.2 seconds and an electronically limited 155‑mph top speed. Built on Jaguar’s lightweight aluminum X350 chassis, it offers a smooth yet athletic ride with double‑wishbone suspension, refined styling, and a spacious, upscale cabin. The XJR’s supercharged V8 provides effortless acceleration and a distinctive whine, making it both a comfortable long‑distance cruiser and a genuinely quick sport‑luxury sedan.