Hennessey supercharges the Mustang Dark Horse to 850PS

Yes, the 850 bit means exactly what you think, with 850PS (625kW) coming courtesy of a whacking great blower, augmented by a high-flow induction system, upgraded fuel injectors and a beefier fuel pump. Hennessey is at pains to point out, that’s a 70 per cent bump on standard. 

In terms of the visuals, the Dark Horse was already a pretty aggressive thing but Hennessey has added a few dabs of carbon-fibre, as well as its own forged wheels and a few badges. The most distinctive thing about this look, however, is the paint job and livery, which is reminiscent of Dan Gurney’s 1967 Le Mans-winning Ford MkIV. As tribute liveries go, this Dark Horse wears it quite well.

Production of the new model is set to begin before the end of the year and, as ever, they’ll come with a three-year/36,000-mile warranty.

”Our supercharged Mustang builds have continually been customer favorites over the years, and Ford's improved S650 platform will prove to be its most capable,” said John Hennessey, founder and CEO.

“Without question, our supercharged 850 horsepower Dark Horse model will be one of the most exciting and powerful muscle cars on the road – sure to turn heads with its distinctive supercharger wail and exhaust note."