The 2021 Cadillac CT5 is available as a 4-door, 5-seat sedan. Starting at $36,995, the 2021 Cadillac CT5 Luxury RWD is powered by a 2.0LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 23-mpg in the city and 32-mpg on the highway. The top of the line 2021CadillacCT5V-Series AWD , priced at $ 47,795 , is powered by a 3.0LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 26-mpg on the highway.