Audi · Subcompact cars · Gasoline
Audi S3: MPG and annual fuel cost, 2026
In model year 2026 the Audi S3 is rated at 26 MPG combined, tied for 7th of 13 subcompact cars, in the lower half.
- 26MPG combinedtied 7th of 13 in class
- $3,150a year in fuel8th of 13 in class
- 346g/mile CO2
Where it stands
Compared only with the gasoline models of its class it is tied for 3rd of 9 gasoline subcompact cars, in the upper half. The median of that narrower group is 24 MPG, against 26 MPG for all subcompact cars together.
Across every class it is tied for 53rd of 180 gasoline models, in the upper half.
Audi has 22 models in the 2026 data. This one ranks 5th of them on combined rating, against a make median of 23 MPG.
In its class, just ahead of it is the Mercedes-Benz CLE-Class at 27 MPG and just behind it is the BMW 8 Series at 24 MPG.
Fuel cost and CO2
At 15,000 miles a year with 55% of them in the city, with premium gasoline at $5.48 per gallon, the annual fuel bill of the most efficient version is about $3,150. That is $100 more than the subcompact cars median of $3,050, which makes it 8th of 13 subcompact cars, in the lower half.
Tailpipe CO2 is 346 g/mile, 5 g/mile above the subcompact cars median of 341.
Rated versions
In the city the most efficient version is rated 23 and on the highway 31, 8 better on the open road. The data lists one version for 2026: S3: 2.0 L, 4 cyl, Automatic (AM-S7), AWD.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| S3: 2.0 L, 4 cyl, Automatic (AM-S7), AWD | 26 | 23 | 31 | $3,150 | 346 |
Year by year
The Audi S3 is in the data for 6 of the 8 model years from 2019 to 2026. Its best combined rating went from 25 in 2019 to 26 MPG in 2026, up 1 MPG. The highest figure came in 2022, at 27. Fuel cost for the best version is $3,150 in the latest data against $3,300 in 2019, 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 | 26 | 26 | $3,150 | 346 | 26 |
| 2025 | 1 | 26 | 26 | $3,150 | 344 | 26 |
| 2023 | 1 | 26 | 26 | $3,150 | 334 | 25 |
| 2022 | 1 | 27 | 27 | $3,050 | 331 | 26 |
| 2020 | 1 | 25 | 25 | $3,300 | 358 | 26 |
| 2019 | 1 | 25 | 25 | $3,300 | 358 | 25 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Ford Mustang | Gasoline | 26 | $2,600 | 2026 |
| Mercedes-Benz CLE-Class | Hybrid | 27 | $3,050 | 2026 |
| BMW 8 Series | Gasoline | 24 | $3,400 | 2026 |
| Audi RS | Gasoline | 23 | $3,550 | 2026 |
| BMW 2 Series | Gasoline | 31 | $2,650 | 2026 |
Rated almost identically and covered by this page:
- Audi A3 28 MPG, $2,950 a year, 1 version, last rated 2026
Compare and rank
Rankings: Subcompact cars, Gasoline, Audi.
Data: US EPA and DOE, as prepared in methods and data.