2015 BMW 550i xDrive vs 2015 BMW 640i xDrive Convertible
| EPA figure | 2015 BMW 550i xDrive | 2015 BMW 640i xDrive Convertible |
|---|---|---|
| Model year | 2015 | 2015 |
| Body · drive | Midsize · All-Wheel Drive · Gas | Subcompact · All-Wheel Drive · Gas |
| Combined MPG | 19 | 23 |
| City / highway MPG | 16 / 24 | 20 / 29 |
| Fuel a year | $4,350 | $3,550 |
| Tailpipe CO₂ (g/mi) | 461 | 385 |
| Engine | 4.4 L 8-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.