The 2001 Buick Regal is available as a 4-door, 5-seat sedan. Starting at $22,965, the 2001 Buick Regal LS is powered by a 3.8L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 30-mpg on the highway. The top of the line 2001 Buick Regal GSE, priced at $26,095, is powered by a 3.8L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 28-mpg on the highway.