The Hartge-tuned BMW 435d takes diesel performance to another level with 398BHP and monstrous torque. But how does it drive? Join me for a full review and test drive of this sleeper beast!

Hartge had a crack at it too, the results of which you see right here. Admittedly, the modifications to the Z1 are pretty tame by Hartge standards. Like the Alpina car, Hartge’s take saw the ...