2026 head-to-head · Large Car
2026 Audi S8 Hybrid vs Mercedes-Benz S-Class
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
AWD · 4.0L 8-cyl turbo · 8-speed automatic · 18 MPG
AWD · 6.0L 12-cyl turbo · 9-speed automatic · 15 MPG
The 2026 Audi S8 Hybrid is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $3,292 a year to fuel (18 MPG), versus $3,950 for the 2026 Mercedes-Benz S-Class (15 MPG). That's roughly $658 a year, or about $3,292 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
- Audi S8 Hybrid
- Mercedes-Benz S-Class
Side by side
| Audi S8 Hybrid | Mercedes-Benz S-Class | |
|---|---|---|
| $3,292 | Your annual fuel cost | $3,950 |
| 18 MPG | Combined efficiency | 15 MPG |
| 15 MPG | City | 12 MPG |
| 24 MPG | Highway | 20 MPG |
| 111 cu ft | Passenger volume | 115 cu ft |
| 13 cu ft | Cargo volume | 12 cu ft |
| 502 g/mi | Tailpipe CO₂ (g/mi) | 603 g/mi |
| 3/10 | EPA fuel economy score | 2/10 |
| 3/10 | EPA greenhouse gas score | 2/10 |
| Hybrid | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 4.0L 8-cyl turbo | Engine / motor | 6.0L 12-cyl turbo |
| 8-speed automatic | 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.
Audi S8 Hybrid vs Mercedes-Benz S-Class across model years
- Audi S8 Hybrid
- Mercedes-Benz S-Class
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 has more passenger space (115 vs. 111 cu ft); the Audi S8 Hybrid has more cargo space (13 vs. 12 cu ft).
Among 24 2026 large cars, the Audi S8 Hybrid ranks 21st and the Mercedes-Benz S-Class 22nd for lowest fuel cost.
The powertrains differ: the Audi S8 Hybrid is a full hybrid, while the Mercedes-Benz S-Class is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2026 Audi S8 Hybrid or the 2026 Mercedes-Benz S-Class?
Measured by cost to drive, the Audi S8 Hybrid. The Audi S8 Hybrid is rated 18 MPG combined and the Mercedes-Benz S-Class 15 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 Audi S8 Hybrid vs. the Mercedes-Benz S-Class per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,292 for the Audi S8 Hybrid and $3,950 for the Mercedes-Benz S-Class.
Which has more cargo space?
The Audi S8 Hybrid, with 13 cu ft of luggage volume versus 12 cu ft (EPA interior volume index).
Audi S8 Hybrid vs Mercedes-Benz S-Class in other years
More 2026 comparisons
Audi S8 Hybrid vs…
Or compare the 2026 Audi S8 Hybrid with anything else: