The 2013 Cadillac CTS is available as a 2-door, 4-seat coupe. Starting at $39,095, the 2013 Cadillac CTS Luxury RWD Sedan w/1SB is powered by a 3.0L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 27-mpg on the highway. The top of the line 2013CadillacCTSPremium AWD Coupe w/1SH , priced at $ 50,050 , is powered by a 3.6L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 27-mpg on the highway.