|
The assumptions made in this post are beyond unreasonable! How do you think the 328i obtains such impressive fuel mileage with a 15-17% loss in the powertrain? That's ridiculous. The facelifted E90 335i has the same N55 that the F30 335i has, yet the F30 335i gets 5mpg better? There are obviously improvements in parasitic losses.
The other thing that really bothers me is that people assume powertrain losses are a function of horsepower. You increase horsepower and increase losses proportionally. That is ridiculous... Losses are going to be more closely related to engine speed. If you increase the boost in the N20 and your power goes up 20% your losses are't going to go up 20% as well....
Let's not mention that drastic variations between dynos and the small varations between cars...
|