A car's speed depends on many factors besides horsepower, including:
* Weight: A heavier car will be slower than a lighter car with the same horsepower.
* Aerodynamics: A more aerodynamic car will be faster than a less aerodynamic car with the same horsepower.
* Gear ratios: The transmission's gear ratios determine how engine power is translated into wheel speed.
* Rolling resistance: Friction from tires and road surface affects speed.
* Drive train efficiency: How efficiently the engine's power is transferred to the wheels.
A 200 horsepower car could have a top speed anywhere from under 100 mph to well over 150 mph depending on these factors.
