2021 head-to-head · Subcompact Car
2021 BMW 4 Series 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 2021 BMW 4 Series is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,043 a year to fuel (29 MPG), versus $2,194 for the 2021 Mercedes-Benz C-Class (27 MPG). That's roughly $151 a year, or about $757 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
- BMW 4 Series
- Mercedes-Benz C-Class
Side by side
| BMW 4 Series | Mercedes-Benz C-Class | |
|---|---|---|
| $2,043 | Your annual fuel cost | $2,194 |
| 29 MPG | Combined efficiency | 27 MPG |
| 26 MPG | City | 24 MPG |
| 34 MPG | Highway | 33 MPG |
| 86 cu ft | Passenger volume | 79 cu ft |
| 12 cu ft | Cargo volume | 10 cu ft |
| 304 g/mi | Tailpipe CO₂ (g/mi) | 330 g/mi |
| 6/10 | EPA fuel economy score | 6/10 |
| 6/10 | 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 |
| 8-speed automatic | Transmission | 9-speed automatic |
| RWD | 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.
BMW 4 Series vs Mercedes-Benz C-Class across model years
- BMW 4 Series
- 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 BMW 4 Series has more passenger space (86 vs. 79 cu ft); the BMW 4 Series has more cargo space (12 vs. 10 cu ft).
Among 34 2021 subcompact cars, the BMW 4 Series ranks 10th and the Mercedes-Benz C-Class 16th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2021 BMW 4 Series or the 2021 Mercedes-Benz C-Class?
Measured by cost to drive, the BMW 4 Series. The BMW 4 Series is rated 29 MPG combined and the Mercedes-Benz C-Class 27 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2021 BMW 4 Series vs. the Mercedes-Benz C-Class per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,043 for the BMW 4 Series and $2,194 for the Mercedes-Benz C-Class.
Which has more cargo space?
The BMW 4 Series, with 12 cu ft of luggage volume versus 10 cu ft (EPA interior volume index).
BMW 4 Series vs Mercedes-Benz C-Class in other years
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