The 2007 Bentley Arnage is available as a 4-door, 5-seat sedan. Starting at $221,990, the 2007 Bentley Arnage R is powered by a 6.8L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 12-mpg in the city and 20-mpg on the highway. The top of the line 2007BentleyArnageT , priced at $ 242,990 , is powered by a 6.8L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 10-mpg in the city and 15-mpg on the highway.