What's the difference between 8 valves and 16 valves?

The average car has four cylinders, and each cylinder has two valves, an intake valve and an exhaust valve, that is, eight valves, which is called 8V. This is a traditional engine.

Similarly, 16 valve means that each cylinder has four valves, two in two rows or three in 1 row (generally two in two rows), and four cylinders have 16 valves, which is the so-called 16V, which is a multi-valve engine, and more.

In fact, 8v and 16v have their own advantages. 8v has relatively simple design structure, low cost, convenient maintenance and good low-speed performance, and is suitable for urban use (because the efficiency advantage of 16v is not reflected at low speed, even worse than 8v). The disadvantage is that the power is difficult to improve, especially at high speed, the inflation efficiency is low and the performance is weak.

The advantages of 16v can be fully reflected at high speed, which can make gasoline burn more fully, reduce fuel consumption and increase power.

So if you often stop and go in the city, it's still 8v, and if you often run fast, it's 16v, but to be honest, you can't understand it without some car experience. It is true that 16v is good on the Internet, and it is also nonsense. At present, multi-valve and even variable valve represent the new technology and general trend in the future, which is definitely good.