Originally Posted by Craigito
Yep..I understand the pros/cons of each setup. I'm just wondering why the same setup wasn't used on both iterations.
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.