All I wanted to say is that diesel may be faster, it is not as sporty as petrol.
It just lacks the fun factor, the emotion. it pushes hard, goes fast, but...sound, revving, all what makes a sportcar, is not there in a diesel motor.
Performance does not mean pleasure. A diesel is not at his place in a sportcar for me. I've driven a lot of diesels, never found one that was half as entertaining as a good petrol counterpart. For the sport I mean.

In an E-Class the 320cdi is just perfect. A diesel AMG just doesn"t really make sense. A spory-oriented hybrid can be a much better solution, for me.

For a Porsche it is an heresy. A shame.