Then it belongs to BMW. The biggest difference between BMW and other cars is the shape of the engine. Most of BMW series have in-line cylinders, that is, four or six cylinders are arranged in a straight line. The technology is that of ordinary cars. If it cannot be achieved, achieving a 50:50 weight ratio between the front and rear of the car will greatly improve the stability of the car and help increase the speed of the car. The cost of this technology is relatively high.