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Engine Displacement Formula:
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Engine displacement refers to the total volume of all the cylinders in an internal combustion engine. It represents the swept volume of all pistons moving from bottom dead center to top dead center and is a key indicator of an engine's power potential and size.
The calculator uses the engine displacement formula:
Where:
Explanation: The formula calculates the volume of a single cylinder (π × B² × S ÷ 4) and multiplies it by the number of cylinders to get total engine displacement.
Details: Engine displacement is a critical measurement that indicates engine size, power output potential, and fuel consumption characteristics. Larger displacements generally produce more power but consume more fuel.
Tips: Enter bore and stroke measurements in inches, and the number of cylinders. All values must be positive numbers (bore > 0, stroke > 0, cylinders ≥ 1).
Q1: What units are used for engine displacement?
A: Engine displacement is typically measured in cubic inches, cubic centimeters, or liters. This calculator uses cubic inches.
Q2: How does bore/stroke ratio affect engine performance?
A: Engines with larger bore relative to stroke (oversquare) typically favor higher RPM operation, while engines with longer stroke relative to bore (undersquare) produce more torque at lower RPM.
Q3: Can I use metric measurements?
A: This calculator requires measurements in inches. Convert metric measurements (1 inch = 25.4 mm) before entering values.
Q4: What is a typical displacement range for different vehicles?
A: Small cars: 60-120 cubic inches, midsize cars: 120-200 cubic inches, trucks/performance cars: 200-400+ cubic inches.
Q5: How accurate is this calculation?
A: This provides theoretical displacement. Actual displacement may vary slightly due to manufacturing tolerances and combustion chamber design.