Speed demons

Bringing the science of road testing into sharp focus, we put the traditional 0-60mph benchmark test under the spotlight. We took the fastest accelerating models from six classes to a wet and wintry airfield to see which was quickest. The Porsche 911 Turbo was most adept at putting its power down on to the slippery tarmac – watch the video at www.autoexpress.co.uk to see how tough getting the best possible time really is.