What does "horsepower" mean in a car?

The unit of horsepower is PS, commonly known as horse.

Horsepower is a commonly used unit for measuring power in engineering technology. It is a physical quantity to measure the maximum speed of a car. A car with high horsepower has a high maximum speed. Torque is a physical quantity to measure the acceleration ability of an automobile. A car with large torque has good acceleration performance, which means strong.

Power refers to the work done by an object in unit time, that is, power is a physical quantity indicating the speed of work. The greater the power, the higher the speed and the higher the maximum speed of the car. Maximum power is often used to describe the dynamic performance of a car. The maximum power is generally expressed in horsepower (PS) or kilowatt (kw), and 1 horsepower is equal to 0.735 kW.