991.1 2S

The Porsche 991.1 911 Carrera S features naturally-aspirated 3.8-liter flat-six engine producing 400 horsepower at 7,400 rpm and 325 lb-ft torque at 5,600 rpm with 7,800 rpm redline through seven-speed manual or PDK dual-clutch transmission and rear-wheel-drive configuration. The 12.5:1 compression ratio and direct fuel injection maintain traditional naturally-aspirated 911 character during 2012-2015 production period before transition to turbocharged 991.2 generation.

First generation 991 platform represents significant evolution from 997 predecessor with longer wheelbase, wider track, and aluminum-steel hybrid construction reducing weight while improving rigidity and handling dynamics. The naturally-aspirated 3.8L flat-six in Carrera S specification preserves traditional high-revving Porsche engine characteristics and linear throttle response preferred by purists, with 991.1 models commanding premium among enthusiasts seeking final naturally-aspirated 911 Carrera variants before mandatory turbocharging transition across entire Carrera range for 991.2 model year 2016.