First, the body structures of the two are different. The load-bearing body is an important part of the car, such as the engine, gearbox, suspension, etc., which are directly installed on the body in white. They are a whole, while the non-load-bearing body is an important part of the car, and the suspension system, engine, gearbox, etc. and the body in white are all installed on a beam of the chassis.
Second, since the load-bearing body has no beam, the overall mass will be lighter, so it is more fuel-efficient, and the center of gravity is relatively low. Because the non-load-bearing body has a beam in the chassis, the overall mass of the body is relatively large, and the fuel consumption will be much higher.
Third, the ride comfort is different. The road form stability of the load-bearing body is better, the noise frequency and vibration in the car are lower, the noise is small, and the utilization rate of the space in the car is higher, which is called significantly better comfort. However, due to the heavy weight, high center of gravity, and the absorption of a certain amount of space in the car, the non-load-bearing body is relatively poor in comfort.
Finally, the biggest advantage of the non-load-bearing body structure is the high body strength. The steel frame can provide strong body rigidity, which is conducive to improving safety. This is particularly important for trucks and off-road vehicles, as the torsional rigidity and load-bearing capacity of the load-bearing body are relatively weak, and the body is easily deformed under extreme working conditions.
