The power performance of a car is a process of straight driving on a good road surface, which can be determined by longitudinal external force, and the corresponding driving performance can be achieved, which is able to achieve the average speed requirement. We can see from this definition, for the road, must be a good pavement level or slope road can exercise can take the process of linear driving, the external factors, the foundation from the vertical force to determine the movement, so that it can reach a certain ability. For athletic ability, there are three main indicators, such as the maximum speed of the car, the speed of acceleration, and the maximum climbing degree. Vehicles running on a good level of road, if they can reach the highest speed, we call the highest speed. For the acceleration time, it is usually the acceleration time at the ground and the time of overtaking, which shows the acceleration of the car. "T" means that the starting time, usually one or two is to start, gradually shifting processing, if traveling to a predetermined distance, speed the time required. It's the time to start. The acceleration time of overtaking can also be represented by "t". Some of the highest secondary cars are at speeds of 30 or 4, and accelerate to express on some highways.