The 2005 Buick Terraza is available as a 4-door, 7-seat passenger van. Starting at $28,110, the 2005 Buick Terraza CX FWD is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 24-mpg on the highway. The top of the line 2005BuickTerrazaCXL AWD , priced at $ 33,855 , is powered by a 3.5L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 23-mpg on the highway.