BMW 840d Cabrio xDrive Steptronic vs BMW 840i Cabrio Steptronic
At 15,000 km a year and typical prices, the BMW 840d Cabrio xDrive Steptronic costs about €1,958 a year in energy against €2,398 for the BMW 840i Cabrio Steptronic, a difference of €441. Official WLTP figures: 6.4 l/100 km against 8.2 l/100 km combined.
Both are variants of the BMW 8 Series; the choice is the powertrain.


| Figure | BMW 840d Cabrio xDrive Steptronic | BMW 840i Cabrio Steptronic |
|---|---|---|
| Motor | Diesel | Petrol |
| Power | 340 PS | 333 PS |
| Combined | 6.4 l/100 km | 8.2 l/100 km |
| City | - | - |
| Suburban | - | - |
| Country road | - | - |
| Motorway | - | - |
| CO₂ | 168.0 g/km | 188.0 g/km |
| Electric range | - | - |
| Energy cost per year at 15,000 km | €1,958 | €2,398 |