Found this 'article' interesting. It was in Maxim Sept 2011.
THe 1 series BMW are pretty small. THis was commentinging on the 'M' version. 0-6 in 4.7sec twin torbo straight 6. (maybe from the 330?)
As you might be aware bmw has a moveable grille block on at least the 5 series.
I gues, if your going fast, you want the air going thru the car.
if your ecommodding you want it to go around.