Porsche 911 Carrera (997) MkII ~ 2008-
Visually, not much changed. The most obvious was the restyled LED rear lamps. Also at the back, the bumper was changed slightly, especially between the exhaust outlets. At the front were LED daylight driving lamps, while Bi-xenon headlamps became standard and borrowed the Cayenne’s dynamic bending system. Also at the front, the air intakes were restyled. Finally, the door mirrors became slightly larger, to meet upcoming EU regulations.
However, this was more than a mere facelift. The 997 was given an all-new engine with 40 percent fewer components. The two-piece crankcase now had integrated crankshaft bearing housings, which reduced weight and size. Also, there was now no intermediate shaft driving the timing chains.
The stroke of the 3.6-litre engine increased, by 1.3mm, to 81.5mm, while the bore went up by 1mm to 97mm. This meant that the capacity increased by 18cc to 3614cc. The cylinder heads had a simpler construction, and were now one-piece with integrated camshaft bearings and guide liners for the hydraulic cup tappets. The lubrication system was optimised to improve efficiency. Finally, and most importantly, the engine now used Direct Fuel Injection, or DFI.
An new option was the PDK (Porsche-Doppelkupplung, or Porsche double clutch) transmission, which replaced the previous Tiptronic S. This seven-speed transmission gave a choice of automatic or manual changes and was faster and more efficient than Tiptronic.