2021 · Subcompact Car · Gas
2021 BMW 4 Series MPG & fuel economy
The 2021 BMW 4 Series is a subcompact car offered in 3 EPA-rated configurations. The most efficient version returns 29 MPG combined (26 city / 34 highway) on premium gasoline. Across the lineup, combined ratings range from 27 to 29 MPG. That's up 2 MPG from the 2020 model. Among 34 subcompact cars rated for 2021, it ranks 10th for lowest fuel cost. At 15,000 miles a year with $3.95/gal premium gas, it costs about $2,043 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2021 BMW 4 Series's fuel average is 12.3 km/L (8.1 L/100 km), or 29 MPG combined: 11.1 km/L in the city and 14.5 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 26 | 11.1 | 9.0 |
| Highway | 34 | 14.5 | 6.9 |
| Combined | 29 | 12.3 | 8.1 |
How it ranks among 2021 Subcompact Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
4 Series MPG across model years
Full history →3 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| RWD · 2.0L 4-cyl turbo · 8-speed automatic 430i Coupe |
Gas | 26 MPG | 34 MPG | 29 MPG | — | $2,043 |
| AWD · 2.0L 4-cyl turbo · 8-speed automatic 430i xDrive Coupe |
Gas | 24 MPG | 33 MPG | 27 MPG | — | $2,194 |
| RWD · 2.0L 4-cyl turbo · 8-speed automatic 430i Convertible |
Gas | 24 MPG | 33 MPG | 27 MPG | — | $2,194 |
Specs (most efficient configuration)
- Fuel
- Premium gasoline
- Engine / motor
- 2.0L 4-cyl turbo
- Transmission
- 8-speed automatic
- Drivetrain
- RWD
- Passenger volume
- 86 cu ft
- Cargo volume
- 12 cu ft
- Tailpipe CO₂
- 304 g/mi
- EPA fuel economy score
- 6/10
- EPA greenhouse gas score
- 6/10
2021 BMW 4 Series vs. rivals
Compare the 2021 4 Series
With any other car from any year, including other 4 Series model years. Type a year to jump, e.g. "2015 Accord".
Same year, other powertrains: 2021 BMW 4 Series Hybrid (26 MPG)
Frequently asked questions
What is the gas mileage of the 2021 BMW 4 Series?
Up to 29 MPG combined (26 city / 34 highway); ratings range from 27 to 29 MPG depending on configuration.
What fuel does the 2021 BMW 4 Series use?
Premium gasoline (premium is required or recommended by the manufacturer).
What is the fuel average in km/L for the 2021 BMW 4 Series?
The 2021 BMW 4 Series's fuel average is 12.3 km/L (8.1 L/100 km), or 29 MPG combined: 11.1 km/L in the city and 14.5 km/L on the highway.
How much does it cost to fuel the 2021 BMW 4 Series per year?
About $2,043 at 15,000 miles a year with $3.95/gal premium gas, or $13.62 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.