BMW · Two-seaters · Gasoline
BMW Z4: MPG and annual fuel cost, 2026
At 28 MPG combined, the BMW Z4 sits 10 MPG above the two-seaters median of 18, which makes it 3rd of 20 two-seaters, in the top quarter, ahead of 89% of the others.
- 28MPG combined3rd of 20 in class
- $2,950a year in fuel3rd of 20 in class
- 312g/mile CO2
Where it stands
Compared only with the gasoline models of its class it is 2nd of 12 gasoline two-seaters, in the top quarter, ahead of 91% of the others. The median of that narrower group is 18.5 MPG, against 18 MPG for all two-seaters together.
Among all gasoline models of the year, regardless of size, it is tied for 36th of 180 gasoline models, in the top quarter.
Within the 23 BMW models rated for 2026 it is tied for 10th on combined rating; the median of the make's line-up is 28 MPG.
In its class, just ahead of it is the Mazda MX-5 at 29 MPG and just behind it is the Toyota GR Supra at 27 MPG.
Fuel cost and CO2
The file prices the fuel for its most efficient version at about $2,950 a year, assuming 15,000 miles a year with 55% of them in the city and premium gasoline at $5.48 per gallon. That is $1,600 less than the two-seaters median of $4,550.
Tailpipe CO2 is 312 g/mile, 134 g/mile below the two-seaters median of 446.
Rated versions
Its city rating is 25 and its highway rating 33: the highway figure is 8 higher. 3 versions are rated for 2026. The most efficient, Z4 sDrive30i: 2.0 L, 4 cyl, Automatic (S8), RWD, gets 28 MPG; the least efficient listed, Z4 M40i: 3.0 L, 6 cyl, Manual 6-spd, RWD, gets 22 MPG, a gap of 6 MPG. With the file's assumptions that gap is worth about $800 a year in fuel.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| Z4 sDrive30i: 2.0 L, 4 cyl, Automatic (S8), RWD | 28 | 25 | 33 | $2,950 | 312 |
| Z4 M40i: 3.0 L, 6 cyl, Automatic (S8), RWD | 25 | 23 | 29 | $3,300 | 346 |
| Z4 M40i: 3.0 L, 6 cyl, Manual 6-spd, RWD | 22 | 19 | 26 | $3,750 | 407 |
Year by year
The BMW Z4 is in the data for 8 of the 8 model years from 2019 to 2026. The headline rating did not move between 2019 and 2026: 28 MPG both times. The number of rated versions grew from 1 to 3.
| Model year | Versions | Best MPG | Lowest MPG | Fuel cost | CO2 g/mi | Class median |
|---|---|---|---|---|---|---|
| 2026 | 3 | 28 | 22 | $2,950 | 312 | 18 |
| 2025 | 3 | 28 | 22 | $2,950 | 312 | 18 |
| 2024 | 2 | 28 | 26 | $2,950 | 312 | 18.5 |
| 2023 | 2 | 28 | 26 | $2,950 | 312 | 17.5 |
| 2022 | 2 | 28 | 25 | $2,950 | 317 | 18 |
| 2021 | 2 | 28 | 25 | $2,950 | 321 | 18 |
| 2020 | 2 | 27 | 26 | $3,050 | 324 | 18 |
| 2019 | 1 | 28 | 28 | $2,950 | 321 | 18 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Mazda MX-5 | Gasoline | 29 | $2,850 | 2026 |
| Toyota GR Supra | Gasoline | 27 | $3,050 | 2026 |
| Nissan Z | Gasoline | 22 | $3,750 | 2026 |
| Lotus Emira | Gasoline | 21 | $3,200 | 2026 |
| Chevrolet Corvette | Gasoline | 19 | $4,350 | 2026 |
Compare and rank
Rankings: Two-seaters, Gasoline, BMW, Gasoline two-seaters.
Data: US EPA and DOE, as prepared in methods and data.