2012 Porsche 911 Carrera 4 GTS updated - Porsche 911 Carrera 4 GTS power unit has its origins in the 3.8-litre, six-cylinder Carrera S engine. A wholesale revamping of the intake duct added 23 hp (17 kW), taking the power output to 408 hp (300 kW) at 7,300 rpm. 320 Newton metres kick in from as low as 1,500 rpm; the six-cylinder engine delivers its rated torque of 420 Nm in the broad engine speed range from 4,200 rpm and 5,600 rpm.