Two Convertibles with some similarities, but otherwise different in most aspects such as the modifications, starting price, horsepower, fuel economy, ground shadow size, height, and maximum occupancy. First of all, there is an $87,200 difference in the base MSRP. The 2018 Bentley Continental GT Speed has a higher starting price than the 2018 Audi R8 Convertible. Also, the 2018 Continental GT Speed has bigger and thirstier engine; the 2018 R8 Convertible gets 3 more mpg. In addition, the R8 Convertible body is slightly smaller than the Continental GT Speed, and in addition to that, it's also shorter. And then, the Bentley Continental GT Speed seats two more passengers than the Audi R8 Convertible. Among similarities are the body structure and market segment.