The 2009 Cadillac SRX is available as a 4-door, 5-seat sport utility. Starting at $40,460, the 2009 Cadillac SRX V6 4x2 is powered by a 3.6L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 23-mpg on the highway. The top of the line 2009CadillacSRXV8 AWD , priced at $ 49,360 , is powered by a 4.6L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 20-mpg on the highway.