The new Porsche 911 is the most important new sports car of 2012. Thanks to an all-new platform, revised engines and improved dynamics, it’s more poised and competent than ever. Steve Sutcliffe talks us through the highlights. Read the review at http://www.autocar.co.uk/CarReviews/RoadTestsHistory/Porsche-911-3.4-Carrera/261765/