Multi cylinder engines can be divided into double cylinder, three cylinder, four cylinder, five cylinder, six cylinder, eight cylinder, twelve cylinder, etc. according to the number of cylinders. Among them, four cylinders and above are the mainstream for modern vehicles, such as:

Four cylinder engine: commonly used in family cars, with small size, light weight, and good economy, but relatively weak power output.
Six cylinder engine: balancing power and economy, with high smoothness and comfort, commonly seen in mid to high end car models.
Eight cylinder and above engines: Strong power and excellent acceleration performance, but high price and large size, mostly used in luxury cars and sports cars.