BMW M340i MPG by year — every rating on record
The BMW M340i has a combined EPA fuel economy rating for 2 model years, from 2020 to 2021. Across those years its best rated version returned 26 mpg (2021) and its thirstiest returned 25 mpg (2020). The EPA record holds 2 configurations for this nameplate, most recently a Compact Cars.
Year-by-year EPA ratings
| Model year | Configurations | Best combined | Worst combined | Class rank that year | Drivetrains | Fuel | EPA class |
|---|---|---|---|---|---|---|---|
| 2020 | 1 | 25 mpg | 25 mpg | #52 of 79 (35th pct) | Rear-Wheel Drive | Premium | Compact Cars |
| 2021 | 1 | 26 mpg | 26 mpg | #46 of 79 (42th pct) | Rear-Wheel Drive | Premium | Compact Cars |
Where it has stood in its class
Ranked against every other nameplate the EPA filed under the same class that year. The BMW M340i placed highest in 2021 at #46 of 79, and lowest in 2020 at #52 of 79. It spent 0 of its 2 ranked years in the top half of its class.
Every configuration on record
All 2 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | 3.0L 6-cyl Rear-Wheel Drive Automatic (S8) Premium | SIDI; Mild Hybrid, turbocharged, Hybrid, start-stop | 23 | 32 | 26 | 442.3 | 11.4 | $3,000 | 333 | 5/10 |
| 2020 | 3.0L 6-cyl Rear-Wheel Drive Automatic (S8) Premium | SIDI, turbocharged, start-stop | 22 | 30 | 25 | 460.0 | 11.9 | $3,100 | 353 | 5/10 |
How the rating has moved between model years
Comparing the best-rated configuration of each year. 1 of 1 year-over-year steps improved the top rating.
| Change | Best combined | Delta | Gallons a year at the newer rating |
|---|---|---|---|
| 2020 → 2021 | 25 → 26 mpg | +1 mpg | 442 gal |
What M340i fuel costs over a year
At the EPA's 11,500 miles a year, the 2021 BMW M340i burns 442 to 442 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 | $1,327 | $1,327 | $0 |
| $3.50/gal | $1,548 | $1,548 | $0 |
| $4.00/gal | $1,769 | $1,769 | $0 |
EPA’s own estimate for the 2021 model year is $3,000 to $3,000 a year in fuel, or $3,750 more than the average new vehicle over five years.
How it compares with other Compact Cars
Across the 498 nameplates EPA classifies as Compact Cars, the median best combined rating is 26 mpg. At 26 mpg the BMW M340i is exactly at the median.
- All Compact 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.