The CS850R Mustang is an 847bhp track-honed muscle car

The most powerful new Mustang you can buy is now faster. Clive Sutton has revealed the upgraded version of its upgraded Ford Mustang (called CS850GT), which is a UK take on the US's version of the upgraded Mustang (the Shelby GT500). This one's called the CS850R. It has been optimised, as those looks suggest, for going round in circles.

Or ‘track driving’ in professional parlance. Also “spirited on-road” driving too. CS takes the base Ford Mustang and its 5.0-litre V8, and adds a bespoke Whipple supercharger, intercooler and active exhaust. That increases power from the standard 454bhp to an alarming 847bhp and 665lb ft of torque.

The front and rear anti-roll bars are carried over from the CS850GT, another 847bhp Clive Sutton ‘Stang, as well as better bracing and new subframe bits and active shocks and ‘linear’ springs.

What makes the R an R – as opposed to a GT – is the fitment of a Torsen differential and a tuning of the final drive ratio from the CS850GT’s 3.55, to 3.37 to make the gearing slightly shorter. This, says CS, “makes the car more eager at launch and when pushing out of a corner, while hard acceleration feels faster and more aggressive”.

There are a few colour and decal tweaks – which you can see – along with red brake calipers and special interior piping, that sort of thing. “Customer feedback we’ve gathered from our GT Mustang enabled us to fine-tune our offering to deliver a quicker, better handling car that provides more driver feedback,” explains boss Clive Sutton.

Each car starts at £121,000, though there are Options. A track spoiler, a bespoke interior, that sort of thing, perfect for going round in circles.