Fiat is a storied Italian brand that is in the Stellantis portfolio, along with Alfa Romeo, Chrysler, Dodge, Jeep, Maserati, and Ram. The Fiat brand was reintroduced in the U.S. in 2011 with the diminutive, retro-styled 500 (now discontinued). The lone Fiat offering, the 500X, while stylish, is an otherwise mediocre performer in our testing.