A car is typically built from the ground upwards and its main parts are the chassis and the body or outer shell. The chassis includes the engine, drive train, brakes and tires, and all this is covered by the body of the car.
The engine, drive train, brakes and tires are assembled on the chassis, which is the main core of a car. The chassis provides the car with stability and strength, while the frame provides the required flexibility and protection. The engine and axle assemblies are fixed to the frame, which is usually made of steel and forms a framework of support for the wheels, vehicular components and the payload added to it.
The engine, drive train, brake and tires in the chassis work in tandem to give the car optimal performance and safety, while in use. The engine converts gasoline energy into mechanical energy. The drive train consists of the transmission, driveshaft, wheels and axles. It works with the engine to make the wheels move.
The suspension system is part of the chassis and contains springs and shock absorbers in addition to other components, to enable a smooth ride over all types of terrain. The tires are important as they form the connection between the car and the road. The body encloses all the mechanical parts of the chassis, the frame and the passenger compartments. It is made of metal or plastic.