2017 head-to-head · Subcompact Car
2017 BMW i3 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 2017 BMW i3 is the cheaper one to run. Driving 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, it costs about $729 a year to fuel (124 MPGe), versus $2,116 for the 2017 Mercedes-Benz C-Class (28 MPG). That's roughly $1,387 a year, or about $6,935 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 i3
- Mercedes-Benz C-Class
Side by side
| BMW i3 | Mercedes-Benz C-Class | |
|---|---|---|
| $729 | Your annual fuel cost | $2,116 |
| 124 MPGe | Combined efficiency | 28 MPG |
| 137 MPGe | City | 24 MPG |
| 111 MPGe | Highway | 34 MPG |
| 27 kWh | Electricity use (kWh/100 mi) | — |
| 81 mi | Driving range | — |
| 84 cu ft | Passenger volume | 90 cu ft |
| 15 cu ft | Cargo volume | 13 cu ft |
| 0 g/mi | Tailpipe CO₂ (g/mi) | 319 g/mi |
| 10/10 | EPA fuel economy score | 6/10 |
| 10/10 | EPA greenhouse gas score | 6/10 |
| 4 hrs | Charge time at 240V | — |
| Electric | Powertrain | Gas |
| Electricity | Fuel | Premium gasoline |
| Electric motor (125 kW) | Engine / motor | 2.0L 4-cyl turbo |
| Single-speed | Transmission | 7-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 i3 vs Mercedes-Benz C-Class across model years
- BMW i3
- 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 Mercedes-Benz C-Class has more passenger space (90 vs. 84 cu ft); the BMW i3 has more cargo space (15 vs. 13 cu ft).
Among 43 2017 subcompact cars, the BMW i3 ranks 1st and the Mercedes-Benz C-Class 15th for lowest fuel cost.
Because the BMW i3 is fully electric, it has no tailpipe emissions and its running cost depends almost entirely on your electricity rate. Cheap overnight home charging widens its advantage over the Mercedes-Benz C-Class; relying on DC fast chargers can erase it.
Frequently asked questions
Which is more fuel-efficient, the 2017 BMW i3 or the 2017 Mercedes-Benz C-Class?
Measured by cost to drive, the BMW i3. The BMW i3 is rated 124 MPGe combined and the Mercedes-Benz C-Class 28 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2017 BMW i3 vs. the Mercedes-Benz C-Class per year?
At 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, about $729 for the BMW i3 and $2,116 for the Mercedes-Benz C-Class.
Which has more cargo space?
The BMW i3, with 15 cu ft of luggage volume versus 13 cu ft (EPA interior volume index).
More 2017 comparisons
BMW i3 vs…
Or compare the 2017 BMW i3 with anything else: