The 2011 Dodge Avenger is available as a 4-door, 5-seat sedan. Starting at $19,245, the 2011 Dodge Avenger Express is powered by a 2.4L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 30-mpg on the highway. The top of the line 2011DodgeAvengerLux , priced at $ 23,745 , is powered by a 2.4L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 31-mpg on the highway.