The engine or the Cylinder.
The profile of the car determines the aerodynamics. The more aerodynamic the car is the less power it takes to move it through the air. That power not used to move the air translates to more speed.
First off, it is not a motor, it is an engine. Of course the engine effects speed. It takes horsepower and torque to move a vehicle. The power of the engine determines how fast the car will go. The gear ratio of the transmission and the differential also determine the speed.
the battery of the car and the speed the car goes up to
It controls the variable power steering on your vehicle. The faster the car goes the less power steering the vehicle needs. The module is what controls that. It senses the cars speed and then determines how much power steering "power" needs to be applied.
In a graph of horsepower versus speed, the point where the power available and the power required curves cross. Above that speed, more power is required than available.
Horse power and gear ratio.
A car accelerates when the engine produces more power than what is needed to overcome friction. The car reaches its maximum speed (on the level) when all the engine power is being used to overcome friction.
Actuator speed is determined by:
The driveshaft in a car brings the power from the engine and the speed through the transmission back to the differential on a car.
medium
The processor speed determines how fast a program runs. The more clockspeed a CPU has the faster it reads the instructions.
an electornic speed controller. It controls the speed of the motor using high power transistors.