2026 BMW 540i xDrive Sedan vs 2026 BMW M440i xDrive Convertible
| EPA figure | 2026 BMW 540i xDrive Sedan | 2026 BMW M440i xDrive Convertible |
|---|---|---|
| Model year | 2026 | 2026 |
| Body · drive | Midsize · All-Wheel Drive · Hybrid | Subcompact · All-Wheel Drive · Hybrid |
| Combined MPG | 28 | 28 |
| City / highway MPG | 26 / 32 | 25 / 32 |
| Fuel a year | $2,950 | $2,950 |
| Tailpipe CO₂ (g/mi) | 308 | 312 |
| Engine | 3.0 L 6-cyl turbo | 3.0 L 6-cyl turbo |
| Transmission | Automatic (S8) | Automatic (S8) |
▲ marks the better official figure on that line: more range, MPG or MPGe; less fuel cost or CO₂. From fueleconomy.gov.