From what we—as well as other auto critics—have seen, the A8 returns those kinds of numbers in real-world driving, too. In nearly a hundred miles of mostly lower-speed stop-and-go commute-style driving in an A8 L, we managed more than 18 mpg.
Fuel economy ratings for the 2011 Audi A8 are probably a bit better than you might think. Thanks to its light weight, aerodynamics, and efficiency-minded engineering in general, the A8 achieves an EPA-rated 17 mpg city, 27 highway. That's really impressive, and actually better overall than the BMW ActiveHybrid 750Li.