Overview: REVIEWS: Ford GT • BMW 5-Series • Porsche 911 GT3 CHALLENGE: Can the diesel Volkswagen Lupo get better mpg than the petrol version? Jeremy drives the new Ford GT40 in Detroit and a diesel VW Lupo around the M25. James drives the new-look BMW 5 series and Richard drives the new - but it looks like every other - Porsche GT3. The Stig drives off the end of an aircraft carrier (!?) and Martin Kemp is the Star in a Reasonably Priced Car.