2021 BMW i3 MPG & Specs — Real-World vs EPA, All Trims
This is an electric model — no gasoline.
Is the 2021 BMW i3 good on gas?
At up to 113 MPG combined, the 2021 BMW i3 is better than average for a Subcompact Cars — that class averages about 22.8 MPG across 5,756 EPA-tested versions, so it's a good pick on fuel for its size.
Real-world MPG vs the EPA number
The EPA figures above come from a standardized dynamometer test, not the open road — real-world MPG typically runs a bit lower depending on your driving, climate and terrain. That's true of every car on this site, old or new.
For its most efficient trim, the EPA estimates about $650 a year in fuel (15,000 miles) — roughly $54 a month.
2021 BMW i3 trims & fuel economy
| Trim (engine / transmission) | Fuel | MPG | Fuel/yr (today's price) |
|---|---|---|---|
| electric, A1 automatic, RWD | ELECTRIC | 113 | $650 |
2021 BMW i3 specs
What the EPA test-car listings record for this model year — every combination sold is a row in the trims table above.
| Engine options | Electric |
| Transmission | A1 automatic |
| Drive type | RWD |
| EPA body class | Subcompact Cars |
| Fuel | Electric |
Other years of the BMW i3
Similar cars (Subcompact Cars)
Cars that take premium · Cheapest cars to fuel · Where fuel grade depends on the trim · Fuel guides
1 trim(s) · EPA FuelEconomy.gov data retrieved 2026-07-24 · fuel prices AAA national average as of 2026-07-05.