Okay kiddo, have you ever seen a motorcycle? It's a really cool vehicle that only has two wheels instead of four like a car. And instead of having a big engine in the front like a car, it has a smaller engine that fits between the rider's legs.
Now imagine if we took that engine from the motorcycle and put it in a car. That's what we call a motorcycle-powered car!
The engine in a motorcycle-powered car is really powerful and can make the car go really fast. But since the car is still a car and not a motorcycle, it can also carry more people and things.
So basically, a motorcycle-powered car is like a car with a super-fast motorcycle engine in it. Pretty cool, huh?