Porsche 911 Carrera 4S Coupe - excellent performance and efficiency Categories Sports car The new Porsche 911 Carrera 4 and 4S models unite the excellent performance and efficiency of the new generation 911 with the dynamic benefits of the latest version of the active all-wheel drive Porsche Traction Management (PTM) system. While... By Spare Wheel, 13 September, 2012
