The XKR-S GT, which joins the new XJR at the New York motor show this week, is a track-ready version of the XKR-S that remains road legal.
Power comes from a 542bhp supercharged 5.0-litre V8 that sends power to the rear wheels through a six-speed auto’ gearbox. The GT is good for a 0-60mph time of 3.9sec, some 0.3sec quicker than the standard XKR. Although Jaguar says the car is theoretically capable of 200mph, it is limited to 186mph.
The GT features a bespoke aerodynamic package that includes a carbonfibre front splitter, dive planes, extended wheel arch spats, a rear diffuser and a large fixed rear wing. Maximum downforce of 145kg is said to be achieved.
Carbon ceramic brake discs are fitted, a first for Jaguar. New front and rear suspension systems also feature, including a wider front track, increased camber, revised bushings and a new steering system with a faster ratio. Bespoke, height-adjustable dampers are another addition that feature a race-derived twin spring system.
Completing the transformation are special lightweight 20in alloys shod in 255/35 Pirelli Corsa rubber at the front and 305/30 tyres at the rear.
"These major modifications take Jaguar in to a new dimension. It will lap the nurburgring in under 7m 40sec yet can be driven in the road if you choose," said Adrian Hallmark, Jaguar's global brand director.
"It is something special, but something that will inform other Jaguar products. By pushing boundaries we will always learn lessons that can be applied elsewhere."