2027 head-to-head · Subcompact Car
2027 BMW 4 Series Hybrid vs Mercedes-Benz SL-Class Hybrid
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
RWD · 2.0L 4-cyl turbo · 9-speed automatic · 23 MPG
The 2027 BMW 4 Series Hybrid is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $1,911 a year to fuel (31 MPG), versus $2,576 for the 2027 Mercedes-Benz SL-Class Hybrid (23 MPG). That's roughly $665 a year, or about $3,324 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 Hybrid
- Mercedes-Benz SL-Class Hybrid
Side by side
| BMW 4 Series Hybrid | Mercedes-Benz SL-Class Hybrid | |
|---|---|---|
| $1,911 | Your annual fuel cost | $2,576 |
| 31 MPG | Combined efficiency | 23 MPG |
| 28 MPG | City | 20 MPG |
| 36 MPG | Highway | 28 MPG |
| 86 cu ft | Passenger volume | 76 cu ft |
| 12 cu ft | Cargo volume | 6 cu ft |
| 285 g/mi | Tailpipe CO₂ (g/mi) | 388 g/mi |
| 6/10 | EPA fuel economy score | 5/10 |
| 6/10 | EPA greenhouse gas score | 5/10 |
| Hybrid | Powertrain | Hybrid |
| 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 Hybrid vs Mercedes-Benz SL-Class Hybrid across model years
- BMW 4 Series Hybrid
- Mercedes-Benz SL-Class Hybrid
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 Hybrid has more passenger space (86 vs. 76 cu ft); the BMW 4 Series Hybrid has more cargo space (12 vs. 6 cu ft).
Among 19 2027 subcompact cars, the BMW 4 Series Hybrid ranks 3rd and the Mercedes-Benz SL-Class Hybrid 11th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2027 BMW 4 Series Hybrid or the 2027 Mercedes-Benz SL-Class Hybrid?
Measured by cost to drive, the BMW 4 Series Hybrid. The BMW 4 Series Hybrid is rated 31 MPG combined and the Mercedes-Benz SL-Class Hybrid 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2027 BMW 4 Series Hybrid vs. the Mercedes-Benz SL-Class Hybrid per year?
At 15,000 miles a year with $3.95/gal premium gas, about $1,911 for the BMW 4 Series Hybrid and $2,576 for the Mercedes-Benz SL-Class Hybrid.
Which has more cargo space?
The BMW 4 Series Hybrid, with 12 cu ft of luggage volume versus 6 cu ft (EPA interior volume index).
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