The 2005 Volvo S80 is available as a 4-door, 5-seat sedan. Starting at $36,365, the 2005 Volvo S80 2.5T FWD is powered by a 2.5L , 5 -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 2005VolvoS80SR w/Premium Package AWD , priced at $ 41,135 , is powered by a 2.5L , 5 - cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 26-mpg on the highway.