2008 Jaguar XK - Review

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Enlarge PhotoThe new XKR has grown slightly in size compared with its predecessor but has managed to shed roughly 70kg thanks to its aluminum construction. The lightweight chassis construction was first utilized for the larger XJ, and subsequently the XK coupe shares 30% of its body with the saloon. According to officials, the design is superior in that it integrates the entire body structure (panels and frame) to improve rigidity instead of relying on a separate spaceframe and individual body panels.

The supercharged XKR gets more rigid springs and dampers than the base XK, with 38% stiffer shocks up front and 24% stiffer units at the rear. This is matched with new calibration of the hydraulic power steering, making it quicker and more accurate. Other enhancements include the addition of a rear-shock tower strut brace and an upgrade of the car’s electronic management for the suspension and stability control. This provides the XKR with greater efficiency in getting its power to the ground and new engine mounts mean there’s very little vibration reverting back into the cabin.

While the standard AJ-V8 engine in the XK range is now feeling a little underdone with only 300hp in base models, the addition of an Eaton supercharger and twin air intakes for the XKR injects plenty of spirit into the Jag coupe. Final output stands at a very healthy 420hp (313kW) at 6,250rpm and 560Nm (413lb-ft.) of torque at 4,000rpm. The XKR also benefits from variable camshaft timing, making the engine much more tractable throughout the rev range. The end result is a 0-100km (0-62mph) time in just over five seconds and an electronically governed top speed of 250km/h (155mph).

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