Two Convertibles with some similarities, but otherwise different in most aspects such as the starting price, fuel economy, horsepower, ground shadow size, and height. First of all, the 2017 Porsche 911 Convertible is priced $116,700 lower compared to the base MSRP of the 2017 Bentley Continental Convertible. Also, the 2017 Continental Convertible has bigger and thirstier engine; the 2017 911 Convertible gets 6.5 more mpg. And finally, the Continental Convertible is both slightly larger and taller than the 911 Convertible. Among similarities are the body structure, market segment, and maximum occupancy.