Porsche is widening the top end of its 911 model line by adding all-wheel drive derivatives of the 911 Carrera 4 GTS. That means the new Coupé and Cabriolet additions will combine the Carrera GTS’s 300kW of power but add the reassurance that usually accompanies all-wheel drive, thanks to Porsche Traction Management (PTM). A limited-slip differential is standard.The Carrera 4 GTS models are powered by the standard 3.8-litre, six-cylinder seen in the “regular” GTS with its 300kW at 7300rpm and 420Nm on tap from 1500rpm.COMING TO SAWhen on the attack, the Carrera 4 GTS Coupe covers the 0-100km/h sprint in 4.6 seconds, the Cabriolet takes 4.8. A six-speed manual transmission is standard though Porsche’s very desirable (but very unpronounceable) Doppelkupplungsgetriebe, or seven-speed PDK, is an option. The visual differences between the Carrera 4 and the rear-wheel drive GTS include the name detail on the doors and rear lid, the reflective stripe between the tail lights and the black 19-inch RS Spyder wheels. Other features include the Sport Design front apron with black spoiler lip and special black side skirts and the black Alcantara covering on several of the cabin surfaces. The Carrera 4 GTS Coupe and Cabriolet will be available in South Africa from August, 2011.