Two engine options are available on the 2021 BMW Z4. The Z4 sDrive30i base model is powered by a 2.0-liter turbo-four with 255 hp and 294 lb-ft of torque. Upgrade to the Z4 M40i, and you'll get a ...

With the X4 xDrive35i engine-upgrade model no longer available, leaving the new-for-2016 BMW X4 M40i as the sole six-cylinder model in the lineup. The M Sport package for the X4 xDrive28i gets a ...

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