What does Power to Weight ratio mean in racing cars?

Question

I dont understand it when people say that.

What does that mean?

Answer 1

Power to Weight ratio is the specific power of the car.
For example:
I'm a karting driver, my kart weights 150kg (driver included), the engine has a power of 45hp.
The Power to Weight ratio is: 150/45=3,33kg/hp
Porsche 911 GT2 has a power to weight ratio of 2,21kg/hp, while a F1 car 0,83kg/hp.
Normal everyday cars usually have power to weight ratio from 10 to 15 kg/hp.
This is just a quick explanation with some examples, hope it was useful to understand power to weight ratio datas.

Answer 2

wow. f1 cars power to weight ratio is incredible... interesting!

Answer 3

Exactly what is says