What kind of vehicle is the 2021 Cadillac CT4? What does it compare to? The 2021 Cadillac CT4 is the brand’s smaller sedan, in a lineup that also includes the CT5—but has waved goodbye to the big CT6. The compact CT4 squares off against German stalwarts such as the BMW 3-Series, Audi A4, and Mercedes-Benz C-Class, not to mention the...
