Motoring magazine. The presenters compete in an epic race across London: Jeremy in a speedboat, James in a car, Richard on his push bike and the Stig on public transport. Richard races the new Aston Martin V8 Vantage convertible against a jet-powered roller skater, and Jeremy track-tests the insanely fast Caparo T1 road-racer. Simon Cowell is the Star in a Reasonably Priced Car.