Advanced all-wheel drive for the new 2009 Porsche 911 Carrera 4 and Carrera 4S

Recently, the Stuttgart-based automaker unveiled the all-new, mildly upgraded 2009 Porsche 911 Carrera. Now, the all-wheel drive variant gets the same treatment. Both the Carrera 4 and Carrera 4S will be available in coupe and cabriolet configurations. For 2009, the all-wheel drive system has been revised and improved with the addition of Porsche Traction Management (PTM).