The 2011 Audi A4 is available as a 4-door, 5-seat sedan. Starting at $32,300, the 2011 Audi A4 FrontTrak FrontTrak Sedan w/o Sunroof is powered by a 2.0L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 30-mpg on the highway. The top of the line 2011AudiA4quattro quattro Avant w/o Sunroof , priced at $ 36,300 , is powered by a 2.0L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 29-mpg on the highway.