Ariel Motor Company, the high-performance manufacturer of ultra-lightweight road, track, and off-road vehicles, has launched its newest and most powerful model to date, the track-oriented Ariel Atom 4RR. Developed to celebrate 25 years of the Ariel Atom, the bespoke, built to order 4RR is fully circuit-optimised, yet road-legal, promising the most focused and intense driving experience in the company’s history.
Engineered to eclipse supercar performance on track, the 4RR has a hand‑built, motorsport‑spec engine producing 525bhp and revving to 8,200rpm. The bespoke powerplant is paired with motorsport‑grade components with every aspect of the 4RR reflecting Ariel’s pursuit of performance and purity.
The new model is the quickest Atom ever, capable of 0-62mph in 2.4 seconds, powering on to 100mph in just 5.1 seconds. Despite its focus on ultimate circuit performance, the 4RR remains a road‑legal vehicle.
At the heart of the Atom 4RR sits a completely bespoke engine, hand-built over 100 hours, designed and specified uniquely for this model. While its heart lies in the robust and reliable 2.0L four-cylinder Honda K20C Type R unit, almost every significant internal and external component is replaced, upgraded or re‑engineered to motorsport specification.
A larger turbocharger peaks at 1.7 bar boost, while a high-pressure fuel system and 1400cc fuel injectors deliver immense mid‑range torque and a ferocious top‑end – maintaining the consistency and resilience required for circuit use. The 4RR features three cockpit-adjustable engine maps with different boost levels: Map 1 – 400bhp / 380Nm; Map 2 – 500bhp / 450Nm; Map 3 – 525bhp / 550Nm. Each hand-built engine is run-in and tested on a dyno before final calibration and power tests.
A new carbon air inlet system, with remote air filter assembly, and an all-new full titanium exhaust and silencer system are fitted to the Atom 4RR. Power is delivered through a Quaife six-speed sequential gearbox with lightweight drive discs, motorsport differential and pneumatic paddle shift, ensuring traction and consistency at all times. Clutchless up and down shifts can be made with auto-blip on downshifts and the lightweight clutch only used for initial start.
The 4RR’s chassis is a fully bronze‑welded, motorsport‑optimised structure offering significantly increased strength over previous Atom generations. To complement this, the car features fully adjustable twin tube Öhlins dampers, adjustable for compression and rebound, machined aluminium uprights, aerofoil section adjustable chromoly wishbones and pushrods.
Braking performance comes from new AP Racing 310mm two-piece ventilated discs – the largest that can fit within the Atom’s wheel set – paired with AP unequal-size, four piston motorsport calipers and race‑spec pads. Cockpit adjustable motorsport ABS features 11 stage adjustment as well as an OFF position, all selectable while driving.
Ariel has developed the 4RR’s aerodynamic package to optimise downforce without introducing unnecessary drag, resulting in a car that is both devastatingly fast in corners and exceptionally stable at higher speeds. New carbon fibre side pods build on those used on the Atom 4R, but are redesigned to incorporate additional cooling for the engine and gearbox, supporting the increased power and track sessions. Carbon fibre bodywork, mudguards and aerofoils further reduce weight of the 4RR.
The Ariel Atom 4RR is the company’s most exclusive model ever available to the most discerning track and road-driving enthusiasts. Each bespoke engine and car is built-to-order, representing 25 years of Ariel expertise and featuring only the best-of-the-best components. The Ariel Atom 4RR is priced from £208,000 plus taxes and is available strictly to order in extremely limited numbers.