简介： The Ariel Atom, with a V8 engine, 900bhp-per-ton and a 0-60mph time under 2.3 seconds, is driven on the track by James. Will it reach 60mph? Richard plays with a Porsche - again. This time, the new 911 Turbo S Cabriolet, which he races against a VW Beetle. A race with a Top Gear twist... Jeremy driv