Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the model year, starting price, horsepower, and fuel economy. First of all, there is a $9,100 difference in the base MSRP. The 2016 BMW 7 Series, a newer vehicle by three model years, has a higher starting price than the 2013 Audi A8. And finally, the 2013 A8 has a more powerful engine than the 2016 7 Series, and it gets 2.4 fewer miles on a gallon of fuel. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.