My car generates -46kg of downforce @ 200km/h, while having CD of 0.30. Is it bad?

There's One Thing i Don't Fully Understand in Automation..

I still don't really understand that. Will my car flip like a CLR?
It has Automation Claimed top speed of 302km/h, and does 0-60 in 2.9 seconds. But generate a minus downforce. So there's that.