What is it?
This is Jaguar's new pin-up, an XK generating almost exactly the same amount of power as the famed XJ220. The XKR-S can't quite match its slippery ancestor for pace, but by virtue of the fact that the nineties hypercar was a limited run, hand-built model, the manufacturer has cheekily dubbed it the 'fastest Jaguar in a generation'.
While that might irk old-school fans of the XJ220 somewhat, there's no questioning the new car's pedigree. Jaguar has breathed long and hard on its familiar 5.0-litre supercharged V8 until it teased an additional 39bhp from it with a reprogrammed ECU and a new exhaust.
That might not sound like much, but the resulting 542bhp and 501lb ft of torque are sufficient to propel the large GT car to 60mph in 4.2 seconds and hit the limiter not long after at 186mph.
In order to reach that top speed safely, Jaguar says the car was subjected to extensive 'Computational Fluid Dynamics' development, which is an engineer's way of saying they've slapped a bodykit on it. Aerodynamic benefits aside, tweaks to the front and back - including a fixed rear spoiler - exaggerate an already aggressive on-road stance.
Its handling attitude has been toughened up, too. Stiffer springs and dampers feature underneath, and Jaguar has recalibrated the steering for better control of a lightweight set of new alloy wheels.