Two Sedans with some similarities, but otherwise different in most aspects such as the horsepower, model year, fuel economy, ground shadow size, height, and maximum occupancy. First of all, a bigger engine usually means less mpg. But the 2014 RS 7 has a more powerful engine and it gets 1 more mpg than the 2016 Quattroporte. Also, the RS 7 is both slightly smaller and shorter than the Quattroporte. In addition, there is a difference in the number of passengers; the Maserati Quattroporte seats one more the Audi RS 7. Among similarities are the body structure, market segment, and starting price.