Difference between 5-valve and 2-valve of automobile engine

Valve means that a single cylinder has an intake valve and an exhaust valve;

Valve 5 means that a single cylinder has three intake valves and two exhaust valves.

Now most of them are four valves, two intake valves and two exhaust valves.

In fact, except for the big difference on the cylinder head, it seems that the difference between the other parts of No.2 valve and No.5 valve is not very big, but they are all small differences. The five-valve cylinder head is relatively large, the intake branch pipe is relatively long, and some parts are connected by rubber. The intake branch of the second valve is made of all aluminum, which is slightly smaller than that of the fifth valve, and the spark plug and fuel nozzle can be seen. In fact, each engine has its advantages and disadvantages. As far as the current market is concerned, the two-valve engine is more popular, more advanced, easier to maintain, less likely to break down, and the accessories are easier for the public to buy.