Celebrating its 25th anniversary this year, the Ariel Atom has been around long enough that it’s possible to forget how awesome it is. Ariel is providing a reminder in the form of an even more extreme version, with more power than any Atom to date. It’s called the Atom 4RR.
Built to celebrate the Atom’s quarter century of existence, the 4RR is built around a heavily upgraded Honda K20C 2.0-liter turbo-four. It’s similar to the engine used in the current Civic Type R and Integra Type S, but here it makes 525 horsepower and 405 lb-ft of torque in the sportiest of three engine maps. Options for 500 hp/331 lb-ft and 400 hp/280 lb-ft are also available.
Ariel extracted that power by changing or upgrading almost everything. The 4RR-spec engine has closed-deck sleeves, Ariel-specific forged pistons and connecting rods, revised cylinder head and port geome …
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Author: Stephen Edelstein
