The 2007 Bentley Arnage is available in three trims: the R, the high-performance T and the stretched RL. The large grand touring saloons receive a new 6-speed automatic transmission for 2007.

For all three trims, the finished product ascends far above the conglomeration of pre-grouped inflexible option packages. Bentley buyers get full access to the services of Bentley Mulliner coach builders. According to Bentley, over 90% of Arnage models are customized to some extent by Mulliner. Through what Bentley calls "personal commissioning," Mulliner finishes each Arnage however the buyer specifies.

The R and RL are powered by a 6.75-liter 16-Valve V8, which churns out 450 horsepower and 645 pound-feet of torque. The T also houses the 6.75-liter V8, but this engine has been adjusted for 50 additional horsepower. Fuel economy for all models is the 10–15 mpg range.