UK carmaker Ariel has unveiled the latest model to join its driver-focused range of hardcore motors, the Atom 3.5R. Building on 2012's Atom 3.5, the R is also powered by a supercharged variant of the Honda Civic Type R's 2.0-liter four-cylinder engine, but now puts down 350 hp and over 243 lb-ft of torque. The extra output comes from an increase in the supercharger's boost, made possible thanks to an upgraded charge-cooler system and remote oil-cooler system housed in the twin side pods.

Combined with a body that weighs just 550 kg, the 3.5R has an enviable power-to-weight ratio of 636 hp per ton, helping it to race from 0-60 mph in 2.6 seconds and from 0-100 mph in just six seconds. Top speed is 155 mph. Power is sent to the rear wheels via a new Sadev six-speed sequential race gearbox with steering wheel mounted paddle shifters. Upshifts are timed at less than 40 milliseconds and downshifts at less than 50. The 3.5R can complete five downshifts in less than one second. Other upgrades on the 3.5R include bespoke Ohlins dampers that can be optimized with springs for road, track and race use on Ariel's uprated pushrod suspension system.

Customers can also tailor the car to their exact requirements, from the bodywork, wheels and tires, to the brakes and various other components including an adjustable limited slip differential. The Ariel Atom 3.5R will go on sale later this year priced from £64,800.