The Bently Continental GT with the W12 is rated at 12 city/19 highway on traditional premium, 8 city/14 highway on E85, and easily less than that on an excited right foot. When we drove the Continental GT V8 at launch we were told that official EPA mileage could be rated as high was 24 mpg on the highway, and that, even with the right-foot factor, would be a generous improvement over the W12 for sacrificing just 67 horsepower and almost nothing in performance.
Autoblog
See also:
technologypulse, Bentley Continental GT V8 hits 24 mpg highway
