What kind of vehicle is the 2021 Infiniti Q50? What does it compare to? The 2021 Infiniti Q50 is a sporty compact sedan that squares off against rivals from Germany—think BMW 3-Series, Audi A4, and Mercedes-Benz C-Class—plus the Volvo S60 and Cadillac CT4. Is the 2021 Infiniti Q50 a good car/SUV? With plenty of underhood punch, the Q50...