Ariel launches 525bhp Atom 4RR – quickest, most powerful road-legal Atom ever
Ariel has launched the Atom 4RR, a 525bhp track-focused road-legal sports car that is the fastest and most powerful Atom ever, accelerating from 0-62mph in 2.4 seconds.
- 525 bhp
- 2.4 seconds
- £208,000 plus taxes
What Happened
Ariel Motor Company has unveiled the Atom 4RR, designed to celebrate 25 years of the Atom. It is circuit-optimised yet road-legal, featuring a bespoke, hand-built 2.0-litre turbocharged Honda engine producing 525bhp and 550Nm of torque, revving to 8,200rpm. The car accelerates from 0-62mph in 2.4 seconds and 0-100mph in 5.1 seconds, with a power-to-weight ratio of over 780bhp per tonne.
2.4 secondsseconds
Quickest Atom ever
“The Atom 4RR is the most focused vehicle we’ve ever built – a car that captures everything we’ve learned over 25 years of pure driver-focused engineering. It is the fastest and most powerful Atom to date, yet it stays true to our founding principles of lightweight, minimalism, and delivering very Serious Fun.”
The engine is built over 100 hours, with closed deck sleeves, forged pistons, revised cylinder head, bespoke camshafts, and a race-spec oiling system. A larger turbocharger peaks at 1.7 bar boost, and three cockpit-adjustable engine maps provide power outputs of 400bhp, 500bhp, and 525bhp. Power is delivered via a Quaife six-speed sequential gearbox with pneumatic paddle shift.
Why this matters
The Atom 4RR represents the pinnacle of Ariel's 25 years of lightweight performance engineering, offering a bespoke, hand-built motorsport engine and race-grade components in a road-legal package, showcasing the brand's 'Serious Fun' ethos.
Terms in This Story
- bhp
- Brake horsepower, a measure of engine power before losses from the drivetrain.
- sequential gearbox
- A type of manual transmission where gears are engaged in order, often with paddle shifters for faster shifts.
- turbocharger
- A device that forces extra air into the engine's combustion chamber, increasing power.
- Öhlins dampers
- High-performance suspension components known for adjustability and quality, often used in motorsport.
Summarised from the linked release; details can be imperfect — always verify against the original source.