2020 head-to-head · Large Car
2020 Audi A8 Plug-in 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 · 54 MPGe + 23 MPG
RWD · 3.0L 6-cyl turbo · 9-speed automatic · 64 MPGe + 23 MPG
The 2020 Mercedes-Benz S-Class Plug-in Hybrid is the cheaper one to run. Driving 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, it costs about $2,017 a year to fuel (64 MPGe + 23 MPG), versus $2,174 for the 2020 Audi A8 Plug-in Hybrid (54 MPGe + 23 MPG). That's roughly $156 a year, or about $781 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 Plug-in Hybrid
- Mercedes-Benz S-Class Plug-in Hybrid
Side by side
| Audi A8 Plug-in Hybrid | Mercedes-Benz S-Class Plug-in Hybrid | |
|---|---|---|
| $2,174 | Your annual fuel cost | $2,017 |
| 54 MPGe + 23 MPG | Combined efficiency | 64 MPGe + 23 MPG |
| 49 MPGe / 21 MPG | City | 58 MPGe / 21 MPG |
| 61 MPGe / 27 MPG | Highway | 73 MPGe / 26 MPG |
| 63 kWh | Electricity use (kWh/100 mi) | 53 kWh |
| 420 mi | Driving range | 510 mi |
| 17 mi | All-electric range | 19 mi |
| 111 cu ft | Passenger volume | 112 cu ft |
| 13 cu ft | Cargo volume | 9 cu ft |
| 213 g/mi | Tailpipe CO₂ (g/mi) | 205 g/mi |
| 7/10 | EPA fuel economy score | 7/10 |
| 9/10 | EPA greenhouse gas score | 9/10 |
| 2.4 hrs | Charge time at 240V | 1.3 hrs |
| Plug-in hybrid | Powertrain | Plug-in hybrid |
| Premium gas + electricity | 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 | 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.
Audi A8 Plug-in Hybrid vs Mercedes-Benz S-Class Plug-in Hybrid across model years
- Audi A8 Plug-in 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
The Mercedes-Benz S-Class Plug-in Hybrid goes farther between stops: about 510 miles on a full tank and charge, compared with 420 miles for the Audi A8 Plug-in Hybrid.
Per EPA interior volume figures, the Audi A8 Plug-in Hybrid has more cargo space (13 vs. 9 cu ft).
Among 32 2020 large cars, the Audi A8 Plug-in Hybrid ranks 15th and the Mercedes-Benz S-Class Plug-in Hybrid 10th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2020 Audi A8 Plug-in Hybrid or the 2020 Mercedes-Benz S-Class Plug-in Hybrid?
Measured by cost to drive, the Mercedes-Benz S-Class Plug-in Hybrid. The Audi A8 Plug-in Hybrid is rated 54 MPGe + 23 MPG combined and the Mercedes-Benz S-Class Plug-in Hybrid 64 MPGe + 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2020 Audi A8 Plug-in Hybrid vs. the Mercedes-Benz S-Class Plug-in Hybrid per year?
At 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, about $2,174 for the Audi A8 Plug-in Hybrid and $2,017 for the Mercedes-Benz S-Class Plug-in Hybrid.
Which has more range?
The Mercedes-Benz S-Class Plug-in Hybrid: about 510 miles versus 420 miles.
Which has more cargo space?
The Audi A8 Plug-in Hybrid, with 13 cu ft of luggage volume versus 9 cu ft (EPA interior volume index).
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