2027 head-to-head · Large Car
2027 BMW i7 vs Mercedes-Benz S-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.
The 2027 BMW i7 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 $958 a year to fuel (95 MPGe), versus $2,576 for the 2027 Mercedes-Benz S-Class Hybrid (23 MPG). That's roughly $1,618 a year, or about $8,088 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 i7
- Mercedes-Benz S-Class Hybrid
Side by side
| BMW i7 | Mercedes-Benz S-Class Hybrid | |
|---|---|---|
| $958 | Your annual fuel cost | $2,576 |
| 95 MPGe | Combined efficiency | 23 MPG |
| 94 MPGe | City | 20 MPG |
| 96 MPGe | Highway | 28 MPG |
| 35.5 kWh | Electricity use (kWh/100 mi) | — |
| 373 mi | Driving range | — |
| 109 cu ft | Passenger volume | 112 cu ft |
| 11 cu ft | Cargo volume | 13 cu ft |
| 0 g/mi | Tailpipe CO₂ (g/mi) | 386 g/mi |
| 9/10 | EPA fuel economy score | 5/10 |
| 10/10 | EPA greenhouse gas score | 5/10 |
| 11 hrs | Charge time at 240V | — |
| Electric | Powertrain | Hybrid |
| Electricity | Fuel | Premium gasoline |
| Electric motors (420 kW) | Engine / motor | 3.0L 6-cyl turbo |
| Single-speed | Transmission | 9-speed automatic |
| AWD | Drivetrain | AWD |
✓ 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 i7 vs Mercedes-Benz S-Class Hybrid across model years
- BMW i7
- Mercedes-Benz S-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 Mercedes-Benz S-Class Hybrid has more cargo space (13 vs. 11 cu ft).
Among 16 2027 large cars, the BMW i7 ranks 5th and the Mercedes-Benz S-Class Hybrid 10th for lowest fuel cost.
Because the BMW i7 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 S-Class Hybrid; relying on DC fast chargers can erase it.
Frequently asked questions
Which is more fuel-efficient, the 2027 BMW i7 or the 2027 Mercedes-Benz S-Class Hybrid?
Measured by cost to drive, the BMW i7. The BMW i7 is rated 95 MPGe combined and the Mercedes-Benz S-Class Hybrid 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2027 BMW i7 vs. the Mercedes-Benz S-Class Hybrid per year?
At 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, about $958 for the BMW i7 and $2,576 for the Mercedes-Benz S-Class Hybrid.
Which has more cargo space?
The Mercedes-Benz S-Class Hybrid, with 13 cu ft of luggage volume versus 11 cu ft (EPA interior volume index).
BMW i7 vs Mercedes-Benz S-Class Hybrid in other years
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