The Porsche 911 GT3 and Turbo S are two very different interpretations of a fast 911. The Turbo S uses raw firepower, four-wheel drive and secure handling to decimate the road in front of it, while the GT3 uses a sharp, naturally aspirated flat-six, two driven wheels and less weight to scythe around a track. Which is fastest in a timed lap of Llandow Circuit? Steve Sutcliffe puts the two head to head to find out... Journalist: Steve Sutcliffe Director/Cam op/Editor: Sam Norton Director/Cam op: Greg Dowswell