* 2.2L I4: This engine produced 168 horsepower and 162 lb-ft of torque. It was the standard engine option for the Z4 2.2i.
* 2.5L I6: This engine produced 189 horsepower and 181 lb-ft of torque. It was available in the Z4 2.5i and the Z4 2.5i Sport.
It's important to note that these are just the base engine options. There were also several special edition models and packages that could have come with different engine options or performance upgrades.
