BMW 840i Convertible MPG by year — every rating on record
The BMW 840i Convertible has a combined EPA fuel economy rating for 7 model years, from 2020 to 2026. Across those years its best rated version returned 25 mpg (2021) and its thirstiest returned 24 mpg (2020). The EPA record holds 7 configurations for this nameplate, most recently a Midsize Cars.
In the EPA record this nameplate also appears as 840i Convertible and 840i Gran Coupe. The figures below cover every one of them.
Year-by-year EPA ratings
| Model year | Configurations | Best combined | Worst combined | Class rank that year | Drivetrains | Fuel | EPA class |
|---|---|---|---|---|---|---|---|
| 2020 | 1 | 24 mpg | 24 mpg | #91 of 124 (27th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
| 2021 | 1 | 25 mpg | 25 mpg | #80 of 116 (31th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
| 2022 | 1 | 25 mpg | 25 mpg | #82 of 121 (32th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
| 2023 | 1 | 24 mpg | 24 mpg | #87 of 117 (26th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
| 2024 | 1 | 24 mpg | 24 mpg | #80 of 101 (21th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
| 2025 | 1 | 24 mpg | 24 mpg | #67 of 86 (22th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
| 2026 | 1 | 24 mpg | 24 mpg | #55 of 66 (17th pct) | Rear-Wheel Drive | Premium | Midsize Cars |
Where it has stood in its class
Ranked against every other nameplate the EPA filed under the same class that year. The BMW 840i Convertible placed highest in 2026 at #55 of 66, and lowest in 2020 at #91 of 124. It spent 0 of its 7 ranked years in the top half of its class.
Every configuration on record
All 7 configurations EPA lists for this nameplate, newest first.
| Year | Configuration | Engine detail | City | Highway | Combined | Gallons/yr | Barrels/yr | EPA fuel cost/yr | CO2 g/mi | GHG |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 3.0L 6-cyl Rear-Wheel Drive Automatic (S8) Premium | SIDI, turbocharged, start-stop | 21 | 29 | 24 | 479.2 | 12.4 | $3,250 | 368 | 5/10 |
| 2025 | 3.0L 6-cyl Rear-Wheel Drive Automatic (S8) Premium | SIDI, turbocharged, start-stop | 21 | 29 | 24 | 479.2 | 12.4 | $3,250 | 368 | 5/10 |
| 2024 | 3.0L 6-cyl Rear-Wheel Drive Automatic (S8) Premium | SIDI, turbocharged, start-stop | 21 | 29 | 24 | 479.2 | 12.4 | $3,250 | 374 | 5/10 |
| 2023 | 3.0L 6-cyl Rear-Wheel Drive Automatic (S8) Premium | SIDI, turbocharged, start-stop | 21 | 29 | 24 | 479.2 | 12.4 | $3,250 | 374 | 5/10 |
| 2022 | 3.0L 6-cyl Rear-Wheel Drive Automatic (S8) Premium | SIDI, turbocharged, start-stop | 22 | 29 | 25 | 460.0 | 11.9 | $3,100 | 360 | 5/10 |
| 2021 | 3.0L 6-cyl Rear-Wheel Drive Automatic (S8) Premium | SIDI, turbocharged, start-stop | 22 | 29 | 25 | 460.0 | 11.9 | $3,100 | 360 | 5/10 |
| 2020 | 3.0L 6-cyl Rear-Wheel Drive Automatic (S8) Premium | SIDI, turbocharged, start-stop | 22 | 29 | 24 | 479.2 | 12.4 | $3,250 | 361 | 5/10 |
How the rating has moved between model years
Comparing the best-rated configuration of each year. 1 of 2 year-over-year steps improved the top rating.
| Change | Best combined | Delta | Gallons a year at the newer rating |
|---|---|---|---|
| 2020 → 2021 | 24 → 25 mpg | +1 mpg | 460 gal |
| 2022 → 2023 | 25 → 24 mpg | -1 mpg | 479 gal |
What 840i Convertible fuel costs over a year
At the EPA's 11,500 miles a year, the 2026 BMW 840i Convertible burns 479 to 479 gallons depending on configuration. Below is what that costs at three pump prices, and how much more the thirstiest configuration costs than the most efficient one.
| Pump price | Most efficient | Thirstiest | Spread |
|---|---|---|---|
| $3.00/gal | $1,438 | $1,438 | $0 |
| $3.50/gal | $1,677 | $1,677 | $0 |
| $4.00/gal | $1,917 | $1,917 | $0 |
EPA’s own estimate for the 2026 model year is $3,250 to $3,250 a year in fuel, or $5,000 more than the average new vehicle over five years.
How it compares with other Midsize Cars
Across the 483 nameplates EPA classifies as Midsize Cars, the median best combined rating is 25 mpg. At 24 mpg the BMW 840i Convertible is 1 mpg below the median, which is worth about $67 a year at $3.50 a gallon.
- All Midsize Cars rankings — every nameplate in the class, best to worst.
Other BMW nameplates
Every BMW model compared → — all nameplates ranked by best combined rating, with what each one costs a year.