2021 BMW 3 Series mpg
Combined mpg, 330i RWD
30mpg
- 26 city, 36 highway.
- Top 28% of 81 sedans (2021).
- 14 trims: 25 to 30 mpg.
12,000 miles a year. Gas $3.20. Power 17 cents per kWh. Plug-in trims: 50% electric miles.
| Trim | Engine | Drive | City mpg | Hwy mpg | Combined | Tank, gal | Miles per tank | Cost a year |
|---|---|---|---|---|---|---|---|---|
| 330i RWD | 2.0L 4cyl | RWD | 26 | 36 | 30 | 15.6 | 468 | $1,280 |
| 330i Sedan North America RWD | 2.0L 4cyl | RWD | 26 | 36 | 30 | 15.6 | 468 | $1,280 |
| 330i xDrive AWD | 2.0L 4cyl | AWD | 25 | 34 | 28 | 15.6 | 437 | $1,371 |
| 330i xDrive Sedan North America | 2.0L | AWD | 25 | 34 | 28 | 15.6 | 437 | $1,371 |
| 330e Plug-In Hybrid North America RWD | 2.0L 4cyl | RWD | 25 | 33 | 28 | 10.6 | 297 | $1,145 |
| 330e Plug-In Hybrid RWD | 2.0L 4cyl | RWD | 25 | 33 | 28 | 10.6 | 297 | $1,145 |
| 330e RWD | 2.0L 4cyl | RWD | 26 | 36 | 28 | 10.6 | 297 | $1,371 |
| 330e xDrive AWD | 2.0L 4cyl | AWD | 25 | 34 | 25 | 10.6 | 265 | $1,536 |
| 330e xDrive Hybrid Plug-in AWD | 2.0L | AWD | 22 | 30 | 25 | 10.6 | 265 | $1,278 |
| 330e xDrive Plug-In Hybrid North America | 2.0L | AWD | 22 | 30 | 25 | 10.6 | 265 | $1,278 |
| M340i RWD | 3.0L 6cyl | RWD | 22 | 32 | 25 | 15.6 | 390 | $1,536 |
| M340i Sedan North America RWD | 3.0L 6cyl | RWD | 22 | 32 | 25 | 15.6 | 390 | $1,536 |
| M340i xDrive AWD | 3.0L 6cyl | AWD | 22 | 31 | 25 | 15.6 | 390 | $1,536 |
| M340i xDrive Sedan North America | 3.0L | AWD | 22 | 31 | 25 | 15.6 | 390 | $1,536 |
Plug-in trims: 50% electric miles.
Fuel cost
330i RWD, 30 mpg combined.
- Per year
- $1,280
- Per month
- $107
- Per mile
- 10.7 cents
- Fill the tank
- $49.92
- Top trim: M340i xDrive AWD. $1,536 a year. $256 more than the 330i RWD.
Plug-in hybrid trims
| Trim | Electric range, mi | MPGe | kWh per 100 mi | Gas mpg | Cost a year |
|---|---|---|---|---|---|
| 330e Plug-In Hybrid North America RWD | 23 | 75 | 45.0 | 28 | $1,145 |
| 330e Plug-In Hybrid RWD | 23 | 75 | 45.0 | 28 | $1,145 |
| 330e xDrive Hybrid Plug-in AWD | 20 | 67 | 50.0 | 25 | $1,278 |
| 330e xDrive Plug-In Hybrid North America | 20 | 67 | 50.0 | 25 | $1,278 |
Cost a year: 50% electric miles, the rest on gas.
Charging specs
| Version | Plug | Onboard AC, kW | DC peak, kW | 10-80%, min | Level 2, hours | Battery, kWh |
|---|---|---|---|---|---|---|
| All | J1772 | 7 | N/A | N/A | 3.5 | 12 |
Charging specs: maker data, one source.
Trip cost
| Trip | Gallons | Cost |
|---|---|---|
| 100 miles | 2.8 | $8.89 |
| 300 miles | 8.3 | $26.67 |
| 500 miles | 13.9 | $44.44 |
| 1,000 miles | 27.8 | $88.89 |
Commute cost
- Per month
- $92
- Per year
- $1,109
- Miles a month
- 867
330i RWD. 20 miles each way, 5 days a week.
Is 30 mpg good? Yes. Beats 81% of 2026 cars.
MPG by year
Rivals
| Car | Cheapest trim | Combined mpg | Compare |
|---|---|---|---|
| 2021 BMW 3 Series | 330i RWD | 30 mpg | |
| 2021 Audi A5 Sportback | A5 Premium AWD | 26 mpg | Compare |
| 2021 Alfa Romeo Giulia | RWD | 27 mpg | |
| 2021 Lexus ES | 350 FWD | 26 mpg | |
| 2021 Mercedes-Benz E-Class All Terrain | CLA 250 Coupe | 25 mpg | |
| 2021 Audi A4 | 40 TFSI Premium AWD | 27 mpg | |
| 2021 Lexus IS | 300 RWD | 25 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