2026 head-to-head · Subcompact Car
2026 Mercedes-Benz SL-Class Hybrid vs Porsche 911
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 · 22 MPG
The 2026 Mercedes-Benz SL-Class Hybrid is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,693 a year to fuel (22 MPG), versus $2,821 for the 2026 Porsche 911 (21 MPG). That's roughly $128 a year, or about $641 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 SL-Class Hybrid
- Porsche 911
Side by side
| Mercedes-Benz SL-Class Hybrid | Porsche 911 | |
|---|---|---|
| $2,693 | Your annual fuel cost | $2,821 |
| 22 MPG | Combined efficiency | 21 MPG |
| 19 MPG | City | 18 MPG |
| 27 MPG | Highway | 25 MPG |
| 76 cu ft | Passenger volume | 70 cu ft |
| 6 cu ft | Cargo volume | 5 cu ft |
| 400 g/mi | Tailpipe CO₂ (g/mi) | 424 g/mi |
| 4/10 | EPA fuel economy score | 4/10 |
| 4/10 | EPA greenhouse gas score | 4/10 |
| Hybrid | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 2.0L 4-cyl turbo | Engine / motor | 3.0L 6-cyl turbo |
| 9-speed automatic | Transmission | 8-speed dual-clutch |
| 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 SL-Class Hybrid vs Porsche 911 across model years
- Mercedes-Benz SL-Class Hybrid
- Porsche 911
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 SL-Class Hybrid has more passenger space (76 vs. 70 cu ft); the Mercedes-Benz SL-Class Hybrid has more cargo space (6 vs. 5 cu ft).
Among 26 2026 subcompact cars, the Mercedes-Benz SL-Class Hybrid ranks 16th and the Porsche 911 18th for lowest fuel cost.
The powertrains differ: the Mercedes-Benz SL-Class Hybrid is a full hybrid, while the Porsche 911 is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2026 Mercedes-Benz SL-Class Hybrid or the 2026 Porsche 911?
Measured by cost to drive, the Mercedes-Benz SL-Class Hybrid. The Mercedes-Benz SL-Class Hybrid is rated 22 MPG combined and the Porsche 911 21 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 Mercedes-Benz SL-Class Hybrid vs. the Porsche 911 per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,693 for the Mercedes-Benz SL-Class Hybrid and $2,821 for the Porsche 911.
Which has more cargo space?
The Mercedes-Benz SL-Class Hybrid, with 6 cu ft of luggage volume versus 5 cu ft (EPA interior volume index).
Mercedes-Benz SL-Class Hybrid vs Porsche 911 in other years
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