The 2004 Audi A4 is available as a 4-door, 5-seat sedan. Starting at $25,250, the 2004 Audi A4 T (EOP Nov/03) (M5) FrontTrak FrontTrak Sedan is powered by a 1.8L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 22-mpg in the city and 31-mpg on the highway. The top of the line 2004AudiA43.0 w/painted bumpers (A5) quattro Sedan , priced at $ 34,290 , is powered by a 3.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway.