Porsche are continuing the generation change of the 911 with the Carrera 4 and Carrera 4S.

The four-wheel drive models, in both Coupé and Cabriolet guise, get new technologies on the engine, transmission and drivetrain fronts.

Depending on the model, the new Carrera offers up to 8.5 percent more power, up to 12.9 percent more fuel economy, and 15.4 percent lower CO2 emissions. Specifically, output of the 3.6-litre power unit is up to 254kW. At the same time a Carrera 4 Coupé with PDK, for example, consumes 10.1 litres of fuel per 100km.

The improvements on the 911 Carrera 4S with its 3.8-litre power unit are equally significant, with maximum output up to 283kW on overall fuel consumption down in the case of Carrera 4S Cabriolet with PDK to 10.7 litres/100km.

In the new generation, electronically controlled "PTM" (Porsche Traction Management) replaces the former all-wheel drive with its viscous multiple-plate clutch. This superior system developed for the 911 Turbo and modified for the Carrera models combines driving pleasure with a higher standard of driving stability, traction and handling ᰬ further enhanced by the mechanical rear axle differential fitted as standard.

The new all-wheel-drive sports cars come with sporting manual transmission featuring six gears. As an alternative the new models are available with Porsche's new "Doppelkupplungsgetriebe" replacing the former Tiptronic S automatic converter transmission and offering a faster gearshift on less fuel. The Doppelkupplungsgetriebe or double-clutch gearbox comes with seven gears shifting electrohydraulically.

The new generation of the 911 model series stands out through the discreet modification of the front end and new lights technology. All new Carrera models come with bi-xenon headlights and new LED daytime driving lights. The newly designed rear light clusters also feature LED technology and, for the first time, "Dynamic Bending Lights" as an option.

All Carrera 4 models come as before with their rear end 44mm wider than on the two-wheel-drive versions. And a new reflector trim bar between the LED rear lights gives the typical rear end of the car even more dynamic character.

The new "PCM" (Porsche Communication Management), with its touch-sensitive screen, improves operation of the optional navigation, information and audio systems. And PCM is now compatible with Bluetooth, USB and iPod requirements.