The 2000 Audi A4 is available as a 4-door, 5-seat sedan. Starting at $23,990, the 2000 Audi A4 T (M5) FWD Sedan is powered by a 1.8L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 24-mpg in the city and 32-mpg on the highway. The top of the line 2000AudiA42.8 (A5) quattro Sedan , priced at $ 31,615 , is powered by a 2.8L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway.