Horsepower (hp) = (Engine Displacement in cc * Maximum RPM * Volumetric Efficiency) / (Constant)
Where:
- Engine Displacement: 133 cc (cubic centimeters)
- Maximum RPM: This value varies depending on the specific engine model and design. For this example, let's assume a maximum RPM of 8000.
- Volumetric Efficiency: This represents how efficiently the engine can fill its cylinders with air-fuel mixture. A typical value can range from 70% to 85%. Let's assume an average of 75% for this example.
- Constant: This is a conversion factor that accounts for units and engine characteristics. A commonly used constant for small gasoline engines is approximately 15,000.
Plugging in the values:
Horsepower (hp) = (133 cc * 8000 RPM * 0.75) / 15,000
= (1,064,000) / 15,000
= 70.93 hp
Therefore, 133cc is approximately equivalent to 70.93 horsepower.
It's important to note that this calculation provides an approximate value, and the actual horsepower of an engine can vary depending on various factors such as engine design, fuel type, and operating conditions.
