Two Convertibles with some similarities, but otherwise different in most aspects such as the starting price, horsepower, fuel economy, ground shadow size, and height. First of all, there is a $26,005 difference in the base MSRP. The 2016 Audi TT Convertible has a higher starting price than the 2016 FIAT 500 Convertible. Also, the 2016 TT Convertible has bigger and thirstier engine; the 2016 500 Convertible gets 8 more mpg. And finally, although the TT Convertible is significantly larger, it has a slightly shorter body than the 500 Convertible. Among similarities are the body structure and maximum occupancy.