2007 Caterham Seven X330 Concept

To celebrate its 50th anniversary, Caterham has unveiled the most powerful Seven ever; the X330 – a one-off supercharged model boasting a mind-boggling power-to-weight ratio of 600 bhp per tonne.The stealthy, matt black concept is based around the range-topping CSR Superlight, but the addition of a supercharger to the four-cylinder 2.3 litre Ford Duratec engine increases power massively from 260