The 2009 Dodge Avenger is available as a 4-door, 5-seat sedan. Starting at $22,450, the 2009 Dodge Avenger R/T (New) is powered by a 2.4LL , 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 2009DodgeAvengerR/T , priced at $ 25,415 , is powered by a 3.5LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 27-mpg on the highway.