Originally Posted by Insider
The 335i makes 300hp with 8.5 psi boost. The 335D needs 26psi to make 286hp. In order to get 26psi, you need a big turbo. That's why it is setup different. Simply put, diesel engines simply don't make the power of gas engines, expecially in the high rpm area, that's why they need so much boost.
Perfect explanation. Thanks.