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



Aston Martin Vantage S review – does it offer enough to take on Porsche's 911 Turbo S

Citroën C5 Aircross review – quirky, honest SUV offering Range Rover comfort on a budget

The Porsche 911 GT4 Challenge is coming, and it might be the most confusing model ever