* Engine design: A highly efficient and well-designed 700cc engine will produce significantly more horsepower than a poorly designed one.
* Aspiration: Naturally aspirated (no turbocharger or supercharger) engines produce less horsepower than forced induction engines of the same displacement.
* Technology: Modern engines with advanced technologies like variable valve timing often produce more power than older engines of the same size.
* Tuning: How the engine is tuned (fuel delivery, ignition timing, etc.) greatly affects its power output.
A 700cc engine could produce anywhere from around 30 horsepower (a very old or inefficient design) to well over 100 horsepower (a modern, high-performance engine with forced induction).