If you blinked, you might have missed! Among cars and supercars classics at Goodwood festival of speed was the black jaguar seem discreet but rather medium-XF. But this is no ordinary XF - it ’s the hot new all-R, claiming a 500bhp supercharged V8 engine of 5.0 litres to compete with BMW ‘ s M5.

As it did with the back cut XKR in 2006, the company Coventry took the measure crowd-pleasing running a prototype version up the hill famous Goodwood, with the cross of Mike expert driver d ‘Test and chief engineer at the wheel - and our spies have caught the machine while she was prepared beyond for its fly.

As you can see, it ’s subtly different standard model with wider wheelarches staying wheels of 19 inches, lower side skirts, a lowered suspension and a front-pin amended, which slightly behind the outfit, has a larger domed hood and inlets deeper to cool the engine.

And what engine. Pompant outside 500bhp, the new V8 supercharged 5.0 litres per should skyrocket the XFR 0-60mph in under four seconds and a top speed limited to 155mph. A system of sophisticated traction control will maintain all this power in control, although the cross Mike driver test has been switched off on the track, taking into account a certain sinister tail slides.

The jaguar has no plan to indicate the XFR the British Motor Show, and buyers can expect to see the article by finishing at Paris Motor Show in October.