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 retaining the traditional rear-wheel drive emphasis of the 911, the all-wheel drive chassis of the Carrera 4 and 4S delivers increased traction, road-holding and dynamic performance over a wide variety of road surfaces and in all weather conditions.
A distinctive identifying feature of the Porsche 911 Carrera 4 and 4S remains the wider rear wheel arches: compared to the two-wheel drive 911 Carrera models, the rear wheel arches each extend further outwards by 22 mm, and house rear tyres that are ten millimetres wider. The signature red light band that connects the two taillights has also taken on a new form.
Source: Porsche Press Release