The 420i has also been available with xDrive in the past. You can find full details for all these engines on our specs pages. The 420d is capable of remarkable efficiency but isn’t the most refined ...

The discontinued 430i split the difference at 42.2mpg. Diesel versions of the 4 Series have been dropped, as well, but they remain by far the efficient option. The 420d can do as much as 60.1mpg on ...

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