2018 BMW 6 Series: 640i xDrive Convertible · 3.0L · AWD · 8-speed automatic
One configuration of the 2018 BMW 6 Series as listed by our sources. Every figure below carries its source.
| Specification | Value | Source |
|---|---|---|
| Engine | 3.0L 6-cylinder turbocharged (SIDI) | EPA fueleconomy.gov |
| Displacement | 3.0 L | EPA fueleconomy.gov |
| Cylinders | 6 | EPA fueleconomy.gov |
| Fuel type | Gasoline | EPA fueleconomy.gov |
| Transmission | 8-speed automatic | EPA fueleconomy.gov |
| Drivetrain | AWD | EPA fueleconomy.gov |
| Combined economy | 22 mpg (10.7 L/100 km) | EPA fueleconomy.gov |
| City economy | 19 mpg (12.4 L/100 km) | EPA fueleconomy.gov |
| Highway economy | 28 mpg (8.4 L/100 km) | EPA fueleconomy.gov |
Provenance & verification
- EPA fueleconomy.gov · US Government public data
Source checked: October 12, 2026
Data verified: October 12, 2026