Lighter, Faster, More Agile: The New 2013 911 Carrera 4 and 911 Carrera 4S, Aug. 27, 2012 /PRNewswire/ -- The new Porsche 911 Carrera 4 unites the performance and efficiency of the new, seventh-generation of the 911 Carrera with the dynamic benefits of the latest version of the active all-wheel-drive system PTM (Porsche Traction Management). The typical...



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