One thousand brake horsepower. One thousand. One thousand! It’s an obscene number of gee-gees to put into a road car, and an unprecedented number for me. Even Jenson Button didn’t have that many as he sped his way to become Formula One’s latest world champion. In fact, he had 200bhp less.

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And, to put it into even better perspective, the majority of cars on our roads struggle to produce 200bhp at all, so this orange mass of Mustang muscle is a very rare monstrosity. Only Bugatti’s 250mph Veyron can boast a near-identical figure, though at £1.25m it is 15 times more expensive than the ’Stang. I’m no virgin when it comes to power. Over the years I’ve been in a Jaguar jet fighter plane and driven an F1 car, experiencing their phenomenal g-forces and neck-snapping twists and turns. But nothing I’ve experienced comes close to the thrill of burying the throttle of this Mustang.

The company behind its fabulous fiendishness is Ultimate Bad Boy. It’s based in America but is owned by Tim Porter, a Brit, who wanted to show the likes of Shelby and Saleen that a Limey can beef up motors just as well as a Yank. Heck, even the joint forces of Ford and Shelby can muster only 500bhp with their offering of the same car.

Porter reckons his creation is the world’s fastest street-legal Mustang. At the heart is an aluminium 5.4-litre engine from Ford’s GT supercar, but with one of the biggest superchargers you can buy this side of a drag strip. It furnishes a vast amount of torque as well as power — 825 lb ft of the stuff. A Lamborghini Murciélago can manage a mere 487 lb ft.

The Mustang has a 0-60mph time of an eye-watering 3.8sec and its exhaust note is sonorous enough to make a nun blaspheme. If you don’t fit extra silencers, it’ll snarl its way to 124 decibels at full chat, which, the experts say, poses the risk of permanent hearing loss if you are regularly exposed to it for more than a minute.

Unbelievably, the engine would cope with a further 500bhp but the chassis wouldn’t. As it is, the 1,000bhp has to be fed to the rear wheels in three parts. From a standstill you get 500bhp until you snatch second gear, when you’re given some more, before you get access to the whole juicy lot in third gear, once the accelerator’s wide open.