The 2011 Cadillac SRX is available as a 4-door, 5-seat sport utility. Starting at $34,615, the 2011 Cadillac SRX Base FWD 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 25-mpg on the highway. The top of the line 2011CadillacSRXTurbo Premium AWD , priced at $ 52,360 , is powered by a 2.8L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 22-mpg on the highway.