* Quattroporte S: 4.7L V8, 433 horsepower
* Quattroporte Sport GT S: 4.7L V8, 433 horsepower
* Quattroporte GTS: 4.7L V8, 433 horsepower
* Quattroporte Sport GT: 4.2L V8, 400 horsepower
So, depending on the specific trim level of the 2010 Quattroporte, the horsepower could range from 400 to 433.