2021 head-to-head · Compact Car
2021 Mercedes-Benz S-Class vs Rolls-Royce Dawn
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 · 6.6L 12-cyl turbo · 8-speed automatic · 14 MPG
The 2021 Mercedes-Benz S-Class is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,962 a year to fuel (20 MPG), versus $4,232 for the 2021 Rolls-Royce Dawn (14 MPG). That's roughly $1,270 a year, or about $6,348 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
- Mercedes-Benz S-Class
- Rolls-Royce Dawn
Side by side
| Mercedes-Benz S-Class | Rolls-Royce Dawn | |
|---|---|---|
| $2,962 | Your annual fuel cost | $4,232 |
| 20 MPG | Combined efficiency | 14 MPG |
| 16 MPG | City | 12 MPG |
| 26 MPG | Highway | 18 MPG |
| 88 cu ft | Passenger volume | 100 cu ft |
| 7 cu ft | Cargo volume | 9 cu ft |
| 454 g/mi | Tailpipe CO₂ (g/mi) | 632 g/mi |
| 4/10 | EPA fuel economy score | 1/10 |
| 4/10 | EPA greenhouse gas score | 1/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 4.0L 8-cyl turbo | Engine / motor | 6.6L 12-cyl turbo |
| 9-speed automatic | Transmission | 8-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.
Mercedes-Benz S-Class vs Rolls-Royce Dawn across model years
- Mercedes-Benz S-Class
- Rolls-Royce Dawn
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 Rolls-Royce Dawn has more passenger space (100 vs. 88 cu ft); the Rolls-Royce Dawn has more cargo space (9 vs. 7 cu ft).
Among 37 2021 compact cars, the Mercedes-Benz S-Class ranks 35th and the Rolls-Royce Dawn 36th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2021 Mercedes-Benz S-Class or the 2021 Rolls-Royce Dawn?
Measured by cost to drive, the Mercedes-Benz S-Class. The Mercedes-Benz S-Class is rated 20 MPG combined and the Rolls-Royce Dawn 14 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2021 Mercedes-Benz S-Class vs. the Rolls-Royce Dawn per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,962 for the Mercedes-Benz S-Class and $4,232 for the Rolls-Royce Dawn.
Which has more cargo space?
The Rolls-Royce Dawn, with 9 cu ft of luggage volume versus 7 cu ft (EPA interior volume index).
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