BMW 7 Series vs Mercedes-Benz S-Class
The BMW 7 Series is the more efficient of the two: it reaches 28 mpg combined versus 26 mpg for the Mercedes-Benz S-Class, a 2 mpg advantage and costs about $200 less per year to fuel.
Across 4 measured categories, the BMW 7 Series leads in 3. Figures are EPA test data, not manufacturer claims.
2015–2027
Mercedes-Benz S-Class
Large Cars · 106 configurations
Head-to-head specifications
| Metric | BMW 7 Series | Mercedes-Benz S-Class |
|---|---|---|
| Best combined MPG | 28 mpg ✓ | 26 mpg |
| Best city MPG | 25 mpg ✓ | 24 mpg |
| Best highway MPG | 31 mpg | 31 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $2,700 ✓ | $2,900 |
| Lowest CO2 output | 130 g/mi | 106 g/mi ✓ |
| Engines offered | SIDI & PFI; Mild Hybrid, SIDI; Mild Hybrid, SIDI; PHEV, SIDI | SIDI; Mild Hybrid, 6.0, SIDI; PHEV, SIDI |
| Transmissions | Automatic (S8) | Automatic 9-spd, Automatic 7-spd |
| Drivetrains | Rear-Wheel Drive, All-Wheel Drive | All-Wheel Drive, 4-Wheel Drive, Rear-Wheel Drive |
| Fuel types | Premium, Premium and Electricity, Diesel | Premium, Premium and Electricity |
| EPA class | Large Cars | Large Cars |
| Years covered | 2015–2027 | 2015–2027 |
| Configurations on record | 69 | 106 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
7 Series vs S-Class: common questions
Which is better on gas, the BMW 7 Series or the Mercedes-Benz S-Class?
The BMW 7 Series is the more efficient of the two: it reaches 28 mpg combined versus 26 mpg for the Mercedes-Benz S-Class, a 2 mpg advantage and costs about $200 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the BMW 7 Series runs about $2,700 a year in fuel at its most efficient configuration, versus about $2,900 for the Mercedes-Benz S-Class — a difference of roughly $200 per year.
What engines do the 7 Series and S-Class offer?
BMW 7 Series: SIDI & PFI; Mild Hybrid, SIDI; Mild Hybrid, SIDI; PHEV, SIDI. Mercedes-Benz S-Class: SIDI; Mild Hybrid, 6.0, SIDI; PHEV, SIDI.
Are they in the same vehicle class?
Yes — the EPA classifies both the BMW 7 Series and the Mercedes-Benz S-Class as Large Cars, so they compete directly.
More 7 Series comparisons
Comparison id: bmw-7-series-vs-mercedes-benz-s-class