It's an almost uniquely British formula – take a car back to its very bare bones in order to make it as fast as possible. And it has worked for decades – the Lotus/Caterham Seven has just entered its seventh decade.
JUN 20th 2017
Video: The world's most lightweight race – Atom v Nomad v Mono v Caterham
No comparison of this kind would be complete without the Caterham, and the 620S represents the Seven. Its competition comes in the form of the BAC Mono, another Ford powered lightweight, and two Ariels. The Atom 3.5 fits in, while the on and off-road Nomad certainly doesn't!
So which is fastest? The Top Gear team find out after the flag drops...
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