why are car engines with 2 valves per cilinder less common nowadays

Question

Can’t we apply technologies such as VVT to make it perform just as well as a car with 4 valves per cilinder?

In: Engineering

Answer 1

With more valves, you can put more air into the cylinder more efficiently. With more air, comes the ability to cleanly burn more fuel and because of the more fuel burnt per power cycle, you create more power for a fractionally increased amount of work