[Leynad Jee]

Just got a tiny bump to the side (light yellow) and was already 5 Km/h slower on the straight with the Glickenhaus. And this 5 km/h more than any other car was the reason i give it a try even it´s not so fast per lap  

Just read in the AC-forum: 

The simulation of damage is very limited right now. For example, you were bumped from behind, which means that automatically the game is giving to your rear wing a penalty of 0.01 in lift + 0.015 in drag per damage point, regardless if that impact wouldnt have damaged the rear wing in the real car in first place, but for me, the worst thing is that it adds up progressively and is cumulative, as if per impact, the wing is getting an additional damage, regardless of its material, resistance and even position.

Seems that damage is some kind of bullshit-bingo in AC