The 2003 Volvo S40 is available as a 4-door, 5-seat sedan. Starting at $23,900, the 2003 Volvo S40 Base is powered by a 1.9L , 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 2003VolvoS40Base , priced at $ 25,800 , is powered by a 1.9L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 30-mpg on the highway.