For example, take whatever technology used on producing V6 power from an L-4 engine or a V8 power from a V6 engine in addition to a large displacing engine. To put it this way, imagine there are two people, one with less muscles and one with well toned muscles. When you take a V6 and add twin-turbos or some type of forced induction to it so that it can produce power like a fresh V8 engine, you are essentially feeding the weaker guy more steroids and energy drinks. Yes, the weaker guy may have the same power as the stronger guy now, but at a cost. The weaker guy’s body will be more worn out. Also, if you add the same amount of steroids and energy drinks to the stronger guy, he will smash the weaker one.

Now back to engines. If you have a smaller displacing engine and a larger displacing engine and you turbocharge or supercharge the smaller one, it may be able to produce as much as, or exceed the performance of the larger engine. However, you will stress-out the smaller engine just to force it to keep up with the performance of the larger engine. And if you use whatever additions on the smaller engine and applied it to the larger engine, the larger engine will still smoke the smaller one.

So there it is: NO replacement for displacement.