With a name that literally means "four doors" in Italian, the Quattroporte is one sports car that isn't afraid to stand out from the pack. However, it isn't just its larger size and refined features that have people talking about this high-performance sedan — with a 440-horsepower V8 engine propelling it from 0-60 in just five seconds, the Maserati Quattroporte Sport GT S is as powerful as it is elegant.