For years, this has been the queen of high performance sports sedans, but her reign is beginning to be contested more than ever, particularly with the arrival of the Porsche Panamera. For 2010, the Quattroporte line is augmented by the new GT S version, which is equipped with a 440 horsepower V8 engine linked to a six-speed sequential transmission. With five large places, it offers a unique interior, adorned with Alcantara leather.