Future of fuel: 4: The great debate
The debate throttles up as Quentin and Harry meet the public in our final video

Audi R8 V8 (2007 - 2015) review – the Porsche 911’s equal is a bargain super sports car
Ferrari Testarossa returns after 30 years, but things have changed
£200k is a lot for a new 911 Turbo so here are some used options