Two Convertibles with some similarities, but otherwise different in most aspects such as the model year, starting price, horsepower, ground shadow size, fuel economy, height, and maximum occupancy. First of all, there is a $28,500 difference in the base MSRP. The 2022 BMW 8 Series Convertible, a newer vehicle by four model years, has a higher starting price than the 2018 Alfa Romeo 4C Spider. Also, the 2022 8 Series Convertible has a more powerful engine and gets 4 mpg less than the 2018 4C Spider. In addition, the 4C Spider body is significantly smaller than the 8 Series Convertible, and in addition to that, it's also slightly shorter. And finally, there is a difference in the number of passengers; the BMW 8 Series Convertible seats two more the Alfa Romeo 4C Spider. Among similarities are the body structure and market segment.