FEATURES Porsches cause palpitations REVIEWS Porsche 911 review REVIEWS Porsche 911 Carrera S 3.0 review FEATURES The eco-friendly winds of change REVIEWS 2012 Porsche 911 Cabriolet makes an open-and-shut case REVIEWS Porsche 911 Carrera S will make you dial 911 fast REVIEWS Audi R8 vs Porsche 911 Carrera S REVIEWS Group Test: 2008 Audi R8 4.2 versus 2008 Porsche 911 Carrera S 3.0