New Generation | Porsche 991 | Daddys-Carparts
The Porsche 991 is the internal designation for the seventh generation Porsche 911 which was unveiled at the 2011 Frankfurt Motor Show on 15 September as the replacement for the 997. The 991 is an entirely new platform, only the third since the original 911 launched in 1963 (the 996 of 1999 was the second new platform).
The design has taken an evolutionary step, in keeping with the previous generation 997 and 996. The designer of the 991 is Porsche's Chief Designer Michael Mauer. The 991 is slightly larger than the 997 and auto start/stop function is standard in the 911 Carrera models.
PDK is available as an option for all 911 Carrera models as 7-speed transmission, featuring manual and automatic modes. Gears 1 to 6 have a sports ratio and top speed is reached in 6th gear. 7th gear has a long ratio and helps to reduce fuel consumption by keeping engine revs low. PDK is essentially two gearboxes in one and thus requires two clutches. For all 991 models PDK is produced by ZF Friedrichshafen.