2025 head-to-head · Large Car
2025 Audi A8 Hybrid vs Mercedes-Benz S-Class Plug-in Hybrid
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 · 3.0L 6-cyl turbo · 8-speed automatic · 22 MPG
The 2025 Mercedes-Benz S-Class Plug-in Hybrid is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas and 18¢/kWh electricity, it costs about $1,736 a year to fuel (63 MPGe + 23 MPG), versus $2,693 for the 2025 Audi A8 Hybrid (22 MPG). That's roughly $958 a year, or about $4,788 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 A8 Hybrid
- Mercedes-Benz S-Class Plug-in Hybrid
Side by side
| Audi A8 Hybrid | Mercedes-Benz S-Class Plug-in Hybrid | |
|---|---|---|
| $2,693 | Your annual fuel cost | $1,736 |
| 22 MPG | Combined efficiency | 63 MPGe + 23 MPG |
| 20 MPG | City | 59 MPGe / 20 MPG |
| 26 MPG | Highway | 70 MPGe / 29 MPG |
| — | Electricity use (kWh/100 mi) | 53 kWh |
| — | Driving range | 470 mi |
| — | All-electric range | 48 mi |
| 111 cu ft | Passenger volume | 112 cu ft |
| 13 cu ft | Cargo volume | 8 cu ft |
| 414 g/mi | Tailpipe CO₂ (g/mi) | 106 g/mi |
| 5/10 | EPA fuel economy score | 7/10 |
| 5/10 | EPA greenhouse gas score | 9/10 |
| — | Charge time at 240V | 2.8 hrs |
| Hybrid | Powertrain | Plug-in hybrid |
| Premium gasoline | Fuel | Premium gas + electricity |
| 3.0L 6-cyl turbo | Engine / motor | 3.0L 6-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 A8 Hybrid vs Mercedes-Benz S-Class Plug-in Hybrid across model years
- Audi A8 Hybrid
- Mercedes-Benz S-Class Plug-in Hybrid
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 Audi A8 Hybrid has more cargo space (13 vs. 8 cu ft).
Among 25 2025 large cars, the Audi A8 Hybrid ranks 18th and the Mercedes-Benz S-Class Plug-in Hybrid 12th for lowest fuel cost.
The powertrains differ: the Audi A8 Hybrid is a full hybrid, while the Mercedes-Benz S-Class Plug-in Hybrid is a plug-in hybrid.
Frequently asked questions
Which is more fuel-efficient, the 2025 Audi A8 Hybrid or the 2025 Mercedes-Benz S-Class Plug-in Hybrid?
Measured by cost to drive, the Mercedes-Benz S-Class Plug-in Hybrid. The Audi A8 Hybrid is rated 22 MPG combined and the Mercedes-Benz S-Class Plug-in Hybrid 63 MPGe + 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2025 Audi A8 Hybrid vs. the Mercedes-Benz S-Class Plug-in Hybrid per year?
At 15,000 miles a year with $3.95/gal premium gas and 18¢/kWh electricity, about $2,693 for the Audi A8 Hybrid and $1,736 for the Mercedes-Benz S-Class Plug-in Hybrid.
Which has more cargo space?
The Audi A8 Hybrid, with 13 cu ft of luggage volume versus 8 cu ft (EPA interior volume index).
Audi A8 Hybrid vs Mercedes-Benz S-Class Plug-in Hybrid in other years
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