The liquid-cooled engine in Porsche’s new 911 GT3 RS makes 513bhp and revs to 9000rpm. How the hell does this old air-cooled flat-six all but match it? Witchcraft! By Ben Miller
IT CAN’T HAVE figured much in Porsche’s thinking: that when it went liquid-cooled with the 996-generation 911’s flat-six, the goal would be left wide open for the air-cooled engine’s ongoing evolution. Porsche had no choice but to move on, and did so convincingly. But great engines refuse to die, and in the hands of Californian restoration specialist Singer Vehicle Design, the air-cooled 911 engine has undergone an aston- ishing evolutionary leap.