How many BHP does it take for you to consider a car "powerful"?

800 plus. It all depends on what you have. Once you get used to a certain power output, you will want more.

350+

Depends on the car, but the 400hp mark typically gets my attention on anything

200ps and more

I say a car above 130hp like the twingo 133 for me is fast but I would say anything above 330hp (around e46 m3 territory) is really quick.

Obviously depends on weight and class but 400+

Depends on the weight but 300+ seems fair enough

250 is already good

Anything under a 10:1 lbs:hp ratio is

400hp,depends on weight to power ratio