Fuelfacts

Large cars · Hybrid · model year 2026

BMW 7 Series Hybrid vs Mercedes-Benz S-Class Hybrid

For model year 2026, the BMW 7 Series Hybrid gets 28 MPG combined and the Mercedes-Benz S-Class Hybrid 23: a 5 MPG lead, or 22% on the lower figure.

Side by side

Ratings of the BMW 7 Series Hybrid and the Mercedes-Benz S-Class Hybrid
MeasureBMW 7 Series HybridMercedes-Benz S-Class Hybrid
Combined fuel economy (best version)28 MPG23 MPG
City25 MPG20 MPG
Highway31 MPG29 MPG
Annual fuel cost$2,950$3,550
Tailpipe CO2317 g/mile380 g/mile
Lowest rated version20 MPG20 MPG
Rated versions33
Rank in class (best combined rating)13th of 2515th of 25
ClassLarge carsLarge cars
PowertrainHybridHybrid

Better figure in bold; each model's most efficient version.

Fuel economy and cost

BMW 7 Series Hybrid28 MPGMercedes-Benz S-Class Hybrid23 MPG
Best combined rating.

Under the file's assumptions the BMW 7 Series Hybrid costs about $2,950 a year to fuel and the Mercedes-Benz S-Class Hybrid about $3,550: $600 a year apart on 15,000 miles.

BMW 7 Series Hybrid$2,950Mercedes-Benz S-Class Hybrid$3,550
Annual fuel cost.

Where each one ranks

Within their class the BMW 7 Series Hybrid is 13th of 25 large cars, in the upper half, ahead of 50% of the others. The Mercedes-Benz S-Class Hybrid is tied for 15th of 25 large cars, in the lower half.

The BMW 7 Series Hybrid has 3 rated versions, from 20 to 28 MPG. The Mercedes-Benz S-Class Hybrid has 3, from 20 to 23 MPG. For the most efficient versions, the BMW 7 Series Hybrid is rated 6 higher on the highway (31 against 25), while the Mercedes-Benz S-Class Hybrid is rated 9 higher on the highway (29 against 20).

Their lineups meet at 20 MPG: 760i xDrive Sedan: 4.4 L, 8 cyl hybrid, Automatic (S8), AWD for the BMW 7 Series Hybrid and S580 4matic Maybach: 4.0 L, 8 cyl hybrid, Automatic 9-spd, AWD for the Mercedes-Benz S-Class Hybrid.

Ratings by model year

Both models are in the data for 4 model years, 2023 to 2026. The BMW 7 Series Hybrid has the higher best rating in 4 of them and the Mercedes-Benz S-Class Hybrid in 0. The widest gap, 5 MPG, was in 2026, when the BMW 7 Series Hybrid led.

Best combined rating by model year
Model yearBMW 7 Series HybridMercedes-Benz S-Class HybridGap
20262823+5
20252824+4
20242824+4
20232723+4
2022not in data24n/a
2021not in data24n/a

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