2025 head-to-head · Midsize Car
2025 Audi S6 Hybrid vs BMW M 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 · 2.9L 6-cyl · 8-speed automatic · 22 MPG
The 2025 Audi S6 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 $2,693 a year to fuel (22 MPG), versus $2,760 for the 2025 BMW M Plug-in Hybrid (50 MPGe + 14 MPG). That's roughly $66 a year, or about $332 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 S6 Hybrid
- BMW M Plug-in Hybrid
Side by side
| Audi S6 Hybrid | BMW M Plug-in Hybrid | |
|---|---|---|
| $2,693 | Your annual fuel cost | $2,760 |
| 22 MPG | Combined efficiency | 50 MPGe + 14 MPG |
| 19 MPG | City | 45 MPGe / 12 MPG |
| 27 MPG | Highway | 57 MPGe / 17 MPG |
| — | Electricity use (kWh/100 mi) | 59 kWh |
| — | Driving range | 270 mi |
| — | All-electric range | 27 mi |
| 99 cu ft | Passenger volume | 98 cu ft |
| 14 cu ft | Cargo volume | 13 cu ft |
| 408 g/mi | Tailpipe CO₂ (g/mi) | 285 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 5/10 | EPA greenhouse gas score | 6/10 |
| — | Charge time at 240V | 4 hrs |
| Hybrid | Powertrain | Plug-in hybrid |
| Premium gasoline | Fuel | Premium gas + electricity |
| 2.9L 6-cyl | Engine / motor | 4.4L 8-cyl turbo |
| 8-speed automatic | Transmission | 8-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 S6 Hybrid vs BMW M Plug-in Hybrid across model years
- Audi S6 Hybrid
- BMW M 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 S6 Hybrid has more cargo space (14 vs. 13 cu ft).
Among 42 2025 midsize cars, the Audi S6 Hybrid ranks 38th and the BMW M Plug-in Hybrid 41st for lowest fuel cost.
The powertrains differ: the Audi S6 Hybrid is a full hybrid, while the BMW M Plug-in Hybrid is a plug-in hybrid.
Frequently asked questions
Which is more fuel-efficient, the 2025 Audi S6 Hybrid or the 2025 BMW M Plug-in Hybrid?
Measured by cost to drive, the Audi S6 Hybrid. The Audi S6 Hybrid is rated 22 MPG combined and the BMW M Plug-in Hybrid 50 MPGe + 14 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2025 Audi S6 Hybrid vs. the BMW M 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 S6 Hybrid and $2,760 for the BMW M Plug-in Hybrid.
Which has more cargo space?
The Audi S6 Hybrid, with 14 cu ft of luggage volume versus 13 cu ft (EPA interior volume index).
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