Two Sedans with more similarities, such as the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy, than differences, like the horsepower and starting price. First of all, there is a $12,500 difference in the base MSRP. The 2017 Audi S8 has a higher starting price than the 2017 Maserati Quattroporte. And finally, the 2017 S8 has a more powerful engine than the 2017 Quattroporte. Among similarities are the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy.