THIS is the comparison Mercedes-Benz dared us to do. ‘Don’t bother with a standard 911,’ they said, as if suggesting it would be no contest. ‘Go for the raciest road version, the GT3. No, seriously: we want to know how our new AMG GT supercar measures up.’
We had our doubts, to be honest, since the Porsche 911 GT3 is effectively a race car for the road, and the AMG GT S while it may well be hugely capable on a race track, is still more luxury sports car than road-going race car. But Benz was insistent and Porsche, of course, didn’t hesitate. Name the date and the track, and we’ll be there, they both said.
That track is Sandown Raceway and, even though it is the middle of winter,…