Two Convertibles with some similarities, but otherwise different in most aspects such as the starting price, fuel economy, market segment, horsepower, ground shadow size, height, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2016 Audi S5 Convertible, which is $51,600 less than the base MSRP of the 2015 Aston Martin V8 Vantage Convertible. Also, the 2015 V8 Vantage Convertible has bigger and thirstier engine; the 2016 S5 Convertible gets 5.5 more mpg. In addition, not only V8 Vantage Convertible is slightly smaller, but it's also shorter than the S5 Convertible. And then, there is a difference in the number of passengers; the Audi S5 Convertible seats two more the Aston Martin V8 Vantage Convertible. Among similarities are the body structure and market segment.