2025 BMW 8 Series mpg
Combined mpg, 840i RWD
24mpg
- 21 city, 29 highway.
- Top 19% of 32 coupes (2025).
- 15 trims: 19 to 24 mpg.
12,000 miles a year. Gas $3.20.
| Trim | Engine | Drive | City mpg | Hwy mpg | Combined | Tank, gal | Miles per tank | Cost a year |
|---|---|---|---|---|---|---|---|---|
| 840i Coupe RWD | 3.0L 6cyl | RWD | 21 | 29 | 24 | 18.0 | 432 | $1,600 |
| 840i Gran Coupe RWD | 3.0L 6cyl | RWD | 21 | 29 | 24 | 18.0 | 432 | $1,600 |
| 840i RWD | 3.0L 6cyl | RWD | 21 | 29 | 24 | 18.0 | 432 | $1,600 |
| 840i xDrive AWD | 3.0L 6cyl | AWD | 21 | 29 | 24 | 18.0 | 432 | $1,600 |
| 840i xDrive Coupe AWD | 3.0L | AWD | 21 | 29 | 24 | 18.0 | 432 | $1,600 |
| 840i xDrive Gran Coupe AWD | 3.0L 6cyl | AWD | 21 | 29 | 24 | 18.0 | 432 | $1,600 |
| 840i Convertible RWD | 3.0L 6cyl | RWD | 21 | 29 | 24 | 18.0 | 432 | $1,600 |
| 840i xDrive Convertible AWD | 3.0L | AWD | 21 | 29 | 24 | 18.0 | 432 | $1,600 |
| M850i xDrive AWD | 4.4L 8cyl | AWD | 17 | 24 | 19 | 18.0 | 342 | $2,021 |
| M850i xDrive Coupe AWD | 4.4L | AWD | 17 | 24 | 19 | 18.0 | 342 | $2,021 |
| M850i xDrive Gran Coupe AWD | 4.4L 8cyl | AWD | 17 | 24 | 19 | 18.0 | 342 | $2,021 |
| M850i xDrive Convertible AWD | 4.4L | AWD | 17 | 24 | 19 | 18.0 | 342 | $2,021 |
| Alpina B8 Gran Coupe AWD | 4.4L 8cyl | AWD | 17 | 24 | 19 | 18.0 | 342 | $2,021 |
| M8 Competition AWD | 4.4L 8cyl | AWD | 17 | 24 | 19 | 18.0 | 342 | $2,021 |
| M8 Competition Gran Coupe AWD | 4.4L 8cyl | AWD | 17 | 24 | 19 | 18.0 | 342 | $2,021 |
Fuel cost
840i RWD, 24 mpg combined.
- Per year
- $1,600
- Per month
- $133
- Per mile
- 13.3 cents
- Fill the tank
- $57.60
- Best mpg: 840i Coupe RWD, 24 mpg. $1,600 a year.
- Top trim: Alpina B8 Gran Coupe AWD. $2,021 a year. $421 more than the 840i RWD.
Trip cost
| Trip | Gallons | Cost |
|---|---|---|
| 100 miles | 3.4 | $11.03 |
| 300 miles | 10.3 | $33.10 |
| 500 miles | 17.2 | $55.17 |
| 1,000 miles | 34.5 | $110 |
Commute cost
- Per month
- $116
- Per year
- $1,387
- Miles a month
- 867
840i RWD. 20 miles each way, 5 days a week.
Is 24 mpg good? Yes. Beats 52% of 2026 cars.
MPG by year
Rivals
| Car | Cheapest trim | Combined mpg | Compare |
|---|---|---|---|
| 2025 BMW 8 Series | 840i RWD | 24 mpg | |
| 2025 Lexus LC | LC 500 RWD | 18 mpg | Compare |
| 2025 Lotus Emira | V6 RWD | 19 mpg | Compare |
| 2025 Mercedes-Benz AMG GT | AMG GT 43 4-Door Coupe | 21 mpg | Compare |
| 2025 BMW M4 | Coupe RWD | 19 mpg |
What this cannot tell you
EPA ratings. Your own mpg will differ.
Gas prices change by state and by week.
- 2 or more sources
- 1 source
- Model-level, rule or estimate
- Sources disagree