What is the size of the BMW 740i engine is it 4.0 or 4.4?

The BMW 740i is equipped with a 3.0-liter inline-six engine, not a 4.0 or 4.4-liter engine. However, the BMW 740i xDrive, which is the all-wheel-drive variant, features the same 3.0-liter engine. The 4.4-liter engine is typically found in the BMW 740i's more powerful sibling, the 750i.