Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, and height, than differences, like the fuel economy, market segment, and starting price. First of all, there is a notable difference in the starting price of the 2016 Tesla Model S, which is $11,400 less than the base MSRP of the 2015 Audi A8. Also, the 2015 A8 is more fuel efficient; it gets 78.5 more mpg than the 2016 Model S. Among similarities are the body structure, market segment, ground shadow size, and height.