Engine Displacement Calculator

Engine Displacement Formula:

\[ \text{Displacement} = \pi \times \left(\frac{\text{bore}}{2}\right)^2 \times \text{stroke} \times \text{cylinders} \]

Bore Diameter:

Stroke Length:

Number of Cylinders:

Output Unit:

Engine Displacement:

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1. What is Engine Displacement?

Engine displacement is the total volume of all the cylinders in an internal combustion engine. It's a key specification that indicates engine size and potential power output. Displacement is typically measured in cubic centimeters (cc), liters (L), or cubic inches (ci).

2. How Does the Calculator Work?

The calculator uses the engine displacement formula:

\[ \text{Displacement} = \pi \times \left(\frac{\text{bore}}{2}\right)^2 \times \text{stroke} \times \text{cylinders} \]

Where:

\( \pi \) — Mathematical constant (~3.14159)
\( \text{bore} \) — Diameter of each cylinder (mm)
\( \text{stroke} \) — Distance piston travels in cylinder (mm)
\( \text{cylinders} \) — Number of cylinders in the engine

Explanation: The formula calculates the volume of a single cylinder (πr²h) and multiplies by the number of cylinders.

3. Importance of Displacement Calculation

Details: Engine displacement is crucial for understanding engine performance characteristics, comparing different engines, and meeting regulations in motorsports. Larger displacement generally means more potential power but often lower fuel efficiency.

4. Using the Calculator

Tips: Enter bore and stroke in millimeters (standard for most engine specifications), number of cylinders (typically 3-12 for passenger vehicles), and select your preferred output unit.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between bore and stroke?
A: Bore is the diameter of the cylinder, while stroke is the distance the piston travels from top to bottom.

Q2: How does displacement relate to engine power?
A: Generally, larger displacement means more potential power, but actual power depends on many factors like compression ratio, forced induction, and engine design.

Q3: What's a typical displacement for modern cars?
A: Most passenger cars range from 1.0L to 3.0L, with performance cars often 3.0L-6.0L or more.

Q4: Why measure in both metric and imperial units?
A: Different regions use different standards - Europe/Asia typically uses cc/L, while North America often uses cubic inches.

Q5: Does displacement affect fuel economy?
A: Generally yes - larger displacement engines typically consume more fuel, though modern technologies can mitigate this.