Lower temperature - more power?

[thepest]

Ok in theory the colder the air that's comming to the engine the more powerful it gets. Right? At least I've heard so. And if I recall correctly there was a video where they put ice in the holes, from where the air comes to the engine.

So my question is if that is true, so a car must be more powerful in the winter when it's colder, right?

Is it possible to figure out how much more powerful?
What do you think