Speed limits 

Hello today I will be talking about speed limits.

The rule of thumb for speed and air resistance
is that for a given car, it takes four times as
much power to go twice as fast.

 If your car can do 50 mph with 35 horsepower,
you'll need 140 horsepower to do 100 mph.
For 200 mph, you'll also need about 560
horsepower. At 300 mph it would might be
around 2,240 horsepower.

Main body: Does speeding damage your
engine

It only adds a second of time and will save
you from future engine.
Transmission, or axle  damage....
Revving the engine won't speed up the
process. In fact, that could cause easily
avoided damage. Cold revving causes
abrupt temperature changes that create
stress between the engine's tight-fitting
components.