2005–2006 Audi A8 fuel economy
The 2005–2006 Audi A8 is rated at 15–18 MPG combined by the EPA, from 15 MPG (6.0 L 12-cyl, Automatic (S6), 4-Wheel or All-Wheel Drive) to 18 MPG (4.2 L 8-cyl, Automatic (S6), 4-Wheel or All-Wheel Drive). The ratings are identical for every model year from 2005 to 2006, so they are shown together. EPA size class: Midsize Cars, Large Cars.
MPG by version
| Version | City | Hwy | Comb. | L/100 km | UK MPG | Fuel cost/yr* |
|---|---|---|---|---|---|---|
| A8 4.2 L 8-cyl, Automatic (S6), 4-Wheel or All-Wheel Drive · Premium Gasoline | 16 | 22 | 18 | 13.1 | 22 | $4,550 |
| A8 L 4.2 L 8-cyl, Automatic (S6), 4-Wheel or All-Wheel Drive · Premium Gasoline | 16 | 22 | 18 | 13.1 | 22 | $4,550 |
| A8 L 6.0 L 12-cyl, Automatic (S6), 4-Wheel or All-Wheel Drive · Premium Gasoline | 13 | 19 | 15 | 15.7 | 18 | $5,500 |
* EPA estimate of yearly fuel (or electricity) cost for 15,000 miles with 55 % city driving, at the fuel prices EPA used for this model year. Use the fuel cost comparison with your own mileage and prices.
About these numbers
EPA ratings come from standard laboratory tests adjusted to reflect real-world driving, so they are best for comparing vehicles. Your own figure will vary with speed, temperature, load, tires and driving style — measure it with the MPG calculator. If you have fitted larger tires, correct the reading with the tire size and fuel economy calculator.
Source: U.S. Environmental Protection Agency and U.S. Department of Energy, fueleconomy.gov. Original data (downloaded 2026-09-29). Data processed by us; errors in processing are ours, not the publisher's.