2023 head-to-head · Subcompact Car
2023 Audi RS vs Mercedes-Benz C-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.
The 2023 Mercedes-Benz C-Class is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,370 a year to fuel (25 MPG), versus $2,576 for the 2023 Audi RS (23 MPG). That's roughly $206 a year, or about $1,030 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 RS
- Mercedes-Benz C-Class
Side by side
| Audi RS | Mercedes-Benz C-Class | |
|---|---|---|
| $2,576 | Your annual fuel cost | $2,370 |
| 23 MPG | Combined efficiency | 25 MPG |
| 20 MPG | City | 22 MPG |
| 29 MPG | Highway | 31 MPG |
| 87 cu ft | Passenger volume | 79 cu ft |
| 8 cu ft | Cargo volume | 10 cu ft |
| 383 g/mi | Tailpipe CO₂ (g/mi) | 351 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 5/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 2.5L 5-cyl turbo | Engine / motor | 2.0L 4-cyl turbo |
| 7-speed dual-clutch | Transmission | 9-speed automatic |
| AWD | Drivetrain | RWD |
✓ 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 RS vs Mercedes-Benz C-Class across model years
- Audi RS
- Mercedes-Benz C-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 Audi RS has more passenger space (87 vs. 79 cu ft); the Mercedes-Benz C-Class has more cargo space (10 vs. 8 cu ft).
Among 31 2023 subcompact cars, the Audi RS ranks 21st and the Mercedes-Benz C-Class 15th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2023 Audi RS or the 2023 Mercedes-Benz C-Class?
Measured by cost to drive, the Mercedes-Benz C-Class. The Audi RS is rated 23 MPG combined and the Mercedes-Benz C-Class 25 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2023 Audi RS vs. the Mercedes-Benz C-Class per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,576 for the Audi RS and $2,370 for the Mercedes-Benz C-Class.
Which has more cargo space?
The Mercedes-Benz C-Class, with 10 cu ft of luggage volume versus 8 cu ft (EPA interior volume index).
Audi RS vs Mercedes-Benz C-Class in other years
More 2023 comparisons
Audi RS vs…
Or compare the 2023 Audi RS with anything else: