Audi · Midsize cars · Hybrid
Audi S6: MPG and annual fuel cost, 2025
The Audi S6 was last rated in the data for model year 2025, at 22 MPG combined, tied for 11th of 12 midsize cars, in the bottom quarter.
- 22MPG combinedtied 11th of 12 in class
- $3,750a year in fueltied 11th of 12 in class
- 408g/mile CO2
Where it stands
Compared only with the hybrid models of its class it is tied for 4th of 5 hybrid midsize cars, in the bottom quarter. The median of that narrower group is 25 MPG, against 29 MPG for all midsize cars together.
Among all hybrid models of the year, regardless of size, it is tied for 10th of 12 hybrid models, in the bottom quarter.
In its class, just ahead of it is the Audi A7 Hybrid at 25 MPG.
Fuel cost and CO2
Assuming 15,000 miles a year with 55% of them in the city and premium gasoline at $5.48 per gallon, fuelling the most efficient version comes to about $3,750 a year. That is $1,125 more than the midsize cars median of $2,625.
Tailpipe CO2 is 408 g/mile, 106 g/mile above the midsize cars median of 302.
Rated versions
Its city rating is 19 and its highway rating 27: the highway figure is 8 higher. The data lists one version for 2025: S6: 2.9 L, 6 cyl hybrid, Automatic (S8), AWD.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| S6: 2.9 L, 6 cyl hybrid, Automatic (S8), AWD | 22 | 19 | 27 | $3,750 | 408 |
Year by year
The Audi S6 is in the data for 6 of the 8 model years from 2019 to 2026. The headline rating did not move between 2020 and 2025: 22 MPG both times.
| Model year | Versions | Best MPG | Lowest MPG | Fuel cost | CO2 g/mi | Class median |
|---|---|---|---|---|---|---|
| 2025 | 1 | 22 | 22 | $3,750 | 408 | 29 |
| 2024 | 1 | 22 | 22 | $3,750 | 410 | 30 |
| 2023 | 1 | 22 | 22 | $3,750 | 408 | 28 |
| 2022 | 1 | 22 | 22 | $3,750 | 408 | 28 |
| 2021 | 1 | 22 | 22 | $3,750 | 410 | 28.5 |
| 2020 | 1 | 22 | 22 | $3,750 | 410 | 28 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Lexus LS Hybrid | Hybrid | 25 | $3,300 | 2025 |
| Lexus ES | Gasoline | 28 | $2,400 | 2025 |
| Subaru Legacy | Gasoline | 30 | $2,250 | 2025 |
| Toyota Prius Plug-in hybrid | Plug-in hybrid | 52 | $1,300 | 2025 |
| Polestar 2 | Electric | 114 | $650 | 2025 |
Rated almost identically and covered by this page:
- Audi S7 22 MPG, $3,750 a year, 1 version, last rated 2025
Compare and rank
Rankings: Midsize cars.
Data: US EPA and DOE, as prepared in methods and data.