Audi · Large cars · Hybrid
Audi S8: MPG and annual fuel cost, 2026
Rated at 18 MPG combined for 2026, the Audi S8 is 22nd of 25 large cars, in the bottom quarter.
- 18MPG combined22nd of 25 in class
- $4,550a year in fuel22nd of 25 in class
- 502g/mile CO2
Where it stands
Compared only with the hybrid models of its class it is 8th of 8 hybrid large cars, in the bottom quarter. The median of that narrower group is 25.5 MPG, against 28 MPG for all large cars together.
Among all hybrid models of the year, regardless of size, it is tied for 84th of 88 hybrid models, in the bottom quarter.
Within the 22 Audi models rated for 2026 it is 18th on combined rating; the median of the make's line-up is 23 MPG.
In its class, just ahead of it is the Dodge Charger at 20 MPG and just behind it is the Mercedes-Benz S-Class at 15 MPG.
Fuel cost and CO2
The file prices the fuel for its most efficient version at about $4,550 a year, assuming 15,000 miles a year with 55% of them in the city and premium gasoline at $5.48 per gallon. That is $1,600 more than the large cars median of $2,950.
It emits 502 g of CO2 per mile from the tailpipe; the large cars median is 298, a difference of 204 g/mile.
Rated versions
Its city rating is 15 and its highway rating 24: the highway figure is 9 higher. The data lists one version for 2026: S8: 4.0 L, 8 cyl hybrid, Automatic (S8), AWD.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| S8: 4.0 L, 8 cyl hybrid, Automatic (S8), AWD | 18 | 15 | 24 | $4,550 | 502 |
Year by year
The Audi S8 is in the data for 7 of the 8 model years from 2019 to 2026. Between 2020 and 2026 the best combined rating rose by 2 MPG, from 16 to 18. Fuel cost for the best version is $4,550 in the latest data against $5,150 in 2020, although the file applies today's fuel prices to every model year, so that change comes from the rating, not from prices.
| Model year | Versions | Best MPG | Lowest MPG | Fuel cost | CO2 g/mi | Class median |
|---|---|---|---|---|---|---|
| 2026 | 1 | 18 | 18 | $4,550 | 502 | 28 |
| 2025 | 1 | 18 | 18 | $4,550 | 502 | 26.5 |
| 2024 | 1 | 18 | 18 | $4,550 | 502 | 26.5 |
| 2023 | 1 | 18 | 18 | $4,550 | 503 | 23 |
| 2022 | 1 | 17 | 17 | $4,850 | 520 | 24 |
| 2021 | 1 | 16 | 16 | $5,150 | 545 | 23 |
| 2020 | 1 | 16 | 16 | $5,150 | 545 | 23 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Genesis G90 Hybrid | Hybrid | 20 | $4,100 | 2026 |
| Dodge Charger | Gasoline | 20 | $3,350 | 2026 |
| Mercedes-Benz S-Class | Gasoline | 15 | $5,500 | 2026 |
| Porsche Panamera | Gasoline | 21 | $3,900 | 2026 |
| Audi A8 Hybrid | Hybrid | 22 | $3,750 | 2026 |
Compare and rank
Rankings: Large cars, Hybrid, Audi, Hybrid large cars.
Data: US EPA and DOE, as prepared in methods and data.