2020 head-to-head · Subcompact Car
2020 Audi S3 vs Mercedes-Benz A-Class
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
AWD · 2.0L 4-cyl turbo · 7-speed dual-clutch · 25 MPG
The 2020 Mercedes-Benz A-Class is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,116 a year to fuel (28 MPG), versus $2,370 for the 2020 Audi S3 (25 MPG). That's roughly $254 a year, or about $1,270 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Audi S3
- Mercedes-Benz A-Class
Side by side
| Audi S3 | Mercedes-Benz A-Class | |
|---|---|---|
| $2,370 | Your annual fuel cost | $2,116 |
| 25 MPG | Combined efficiency | 28 MPG |
| 22 MPG | City | 24 MPG |
| 29 MPG | Highway | 34 MPG |
| 86 cu ft | Passenger volume | 91 cu ft |
| 10 cu ft | Cargo volume | 9 cu ft |
| 358 g/mi | Tailpipe CO₂ (g/mi) | 324 g/mi |
| 5/10 | EPA fuel economy score | 6/10 |
| 5/10 | EPA greenhouse gas score | 6/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 2.0L 4-cyl turbo | Engine / motor | 2.0L 4-cyl turbo |
| 7-speed dual-clutch | Transmission | 7-speed automatic |
| AWD | Drivetrain | 4WD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Audi S3 vs Mercedes-Benz A-Class across model years
- Audi S3
- Mercedes-Benz A-Class
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Per EPA interior volume figures, the Mercedes-Benz A-Class has more passenger space (91 vs. 86 cu ft); the Audi S3 has more cargo space (10 vs. 9 cu ft).
Among 39 2020 subcompact cars, the Audi S3 ranks 21st and the Mercedes-Benz A-Class 14th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2020 Audi S3 or the 2020 Mercedes-Benz A-Class?
Measured by cost to drive, the Mercedes-Benz A-Class. The Audi S3 is rated 25 MPG combined and the Mercedes-Benz A-Class 28 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2020 Audi S3 vs. the Mercedes-Benz A-Class per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,370 for the Audi S3 and $2,116 for the Mercedes-Benz A-Class.
Which has more cargo space?
The Audi S3, with 10 cu ft of luggage volume versus 9 cu ft (EPA interior volume index).
Audi S3 vs Mercedes-Benz A-Class in other years
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