The 1999 Subaru Legacy is available as a 4-door, 5-seat wagon. Starting at $23,395, the 1999 Subaru Legacy 30th Ann. SUS (A4) Sedan is powered by a 2.5L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 26-mpg on the highway. The top of the line 1999SubaruLegacyOutback SSV (A4) Wagon , priced at $ 19,995 , is powered by a 2.5L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 26-mpg on the highway.