The Ariel Atom is a road legal high performance sports car made by the Ariel Motor Company based in Crewkerne, Somerset, England and under licence in North America by TMI Autotech, Inc. at Virginia International Raceway in Alton, Virginia.
There have been five Ariel Atom incarnations to date: Ariel Atom, Ariel Atom 2, Ariel Atom 3, Ariel Atom 3 Mugen Limited Edition (only 10 made) Ariel Atom 3,5 and Ariel Atom 500 V8 Limited Edition (only 25 to be made). The current models are the Ariel Atom 3,5 and the limited production Ariel Atom 500 V8 with a 500 bhp (373 kW; 507 PS) V8 engine
The Ariel Atom is unusual in that it is exoskeletal — the chassis is prominently visible from the outside — and therefore lacks a roof, windows and other features normally found on road cars although a small windscreen is available as an optional extra. The chassis design leads to a relatively high drag coefficient of 0.40 in comparison to more aerodynamic road cars.
Source Ariel Atom