Two Convertibles with some similarities, but otherwise different in most aspects such as the model year, ground shadow size, height, starting price, horsepower, and maximum occupancy. First of all, there is a notable difference in the starting price of the 2022 BMW 4 Series Convertible, which is $12,600 less than the base MSRP of the 2018 Alfa Romeo 4C Spider, which is four model years older. Also, the 2018 4C Spider produces fewer horsepower than the 2022 4 Series Convertible. In addition, the 4C Spider is both significantly smaller and shorter than the 4 Series Convertible. And finally, there is a difference in the number of passengers; the BMW 4 Series Convertible seats two more the Alfa Romeo 4C Spider. Among similarities are the body structure, market segment, and fuel economy.