Jaguar planning to extend production run of XKR-S GT if there is strong demand

Article by Christian Andrei, on April 10, 2013

As long as there’s sufficient demand for additional units, Jaguar will extend the production run of the limited-edition Jaguar XKR-S GT. At the start, Jaguar had been insistent that just 30 units of the hardcore, race-based XK will be produced. All of these will be sold in the US and Canada. But only 24 hours after the car was launched at the New York Motor Show, confirmation came from Jaguar boss Adrian Hallmark about 20 more cars to be built if customers asked for it.

He said, according to Autocar, that the production run may reach 50 units. The XKR-S GT, which is equipped with a 542bhp supercharged 5.0-litre V8, can go around the Nürburgring in one lap in less than 7min 40sec, which is approximately the same time as the record set by Ferrari 458 Italia.

Hallmark added that this project made them learn more about what makes a car go fast, something that will enable them to improve their road car programs. He said that rather than improving their lap times by increasing the engine’s output, Jaguar concentrated on factors such as driveability, aero enhancements, weight saving, and brake performance.

Exterior Design

According to Ian Callum, Director of Design at Jaguar, the XKR-S GT has been designed according to the laws of physics as it was developed in the wind tunnel and on the racetrack with an objective to create stability at high speeds and downforce as much as possible. All of these resulted to a car that is not only raw and focused as well as very quick.

Up front, the new Jaguar XKR-S GT is specified with a carbon-fiber splitter -- of race-car wrap-around type – that extends forward by 60mm. This splitter helps optimize flow of air around, over and under the XKR-S GT. Airflow around the car is made more efficient by carbon-fiber twin dive-planes and wheel-arch extensions while airflow under the XKR-S GT is made smoother by an optimized aluminum front valance, which could also improve engine and brake cooling performance.

Exit of air from under the XKR-S GT is smoothened by a rear carbon-fiber diffuser while rear downforce is optimized by a carbon-fiber elevated rear wing and the decklid mounted spoiler. As estimated, the XKR-S GT produces 145kg (320lb) of downforce when it travels at top speed (electronically limited to 186 mph). In addition, Bonnet louvers further help cool the engine and improve aerodynamic performance by enhancing airflow through the front end of the XKR-S GT.

Quite a number of the new hardware for the XKR-S GT were derived from the F-TYPE: front and rear suspension arms, wheel bearings, rear subframe, bushings and uprights. Jaguar configured the setup for the XKR-S GT to enable higher level of lateral suspension stiffness, thereby allowing for greater responsiveness and precision.

Moreover, the car’s revised suspension system features new spring and damper module design. Its motorsport-derived twin spring system boasts of front and rear spring rates that are around 68-percent and 25-percent, respectively, stiffer than on the XKR-S. This spring system is now paired to Jaguar's Adaptive Dynamics damping system that features ride-height adjustable dampers that have been tuned to be more track-focused, allowing for a whole new level of body control, traction and grip when the dynamic mode is accessed.

Compared to the front track of the Jaguar XKR-S, that of the new XKR-S GT is around 52mm wider. Both cars have the same rear track. While the steering rack of XKR-S GT is derived from the F-Type, it boasts of faster ratio and retuned steering valve, allowing for quicker turn-in and response to steering inputs. The new Jaguar XKR-S GT rides in 20-inch gloss black, forged, lightweight alloy wheels wrapped in Pirelli Corsa performance tires (255/35 and 305/30 front/rear).

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