The Ariel Atom is a road-legal high performance open-wheel car made by the British Ariel Motor Company based in Crewkerne, Somerset, England, and under license in North America by TMI Autotech, Inc. at Virginia International Raceway in Alton, Virginia.

There have been eight Ariel Atom generations to date: Ariel Atom, Ariel Atom 2, Ariel Atom 3 (including the Ariel Atom 3 Mugen Limited Edition and Honda Racing Edition – of which only one was made) Ariel Atom 3.5, Ariel Atom 3S, Ariel Spec:Race Atom, Ariel Atom 500 V8 Limited Edition (only 25 to be made), and the Ariel Atom 4. The limited production Ariel Atom 500 V8 featured a 373 kW (500 bhp; 507 PS) V8 engine. The Ariel Atom 4 uses a turbocharged 2.0 litre engine, also used in the Honda Civic Type R, with 3-stage boost.[2][3]

The Ariel Atom features a prominently visible chassis (i.e., an exoskeleton, no roof or windows, a small optional windscreen) and a drag coefficient of 0.40