Since nearly every one of Fiat's small Italian cars and crossovers is named 500, it's helpful to know which one is best for you. The 500 is a tiny city-friendly car, available as a hardtop, convertible or electric vehicle. The 500L is a 5-door multi-purpose vehicle. The 500X is a small crossover SUV. The 124 Spider roadster is nicknamed "Fiata" since it's based on the Mazda MX-5 Miata.