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Displacement
Displacement is the foundation for most of an engine build, from compression to fuel demand. Enter the bore, stroke and number of cylinders, and we work out the cylinder volume and the total displacement in cc, litres and cubic inches.
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Displacement
2 316 cc
How the calculation works
A cylinder's volume is the area of the bore times the stroke, that is π × radius squared × stroke. Multiplied by the number of cylinders it gives the total displacement. Measurements in mm give a result in cubic millimetres, which we divide by 1000 to get cc.
The ratio between bore and stroke says something about the engine's character. Equal bore and stroke is called square, a larger bore than stroke (short stroke) tolerates higher rpm, and a longer stroke gives more torque lower in the range.
Example
A Volvo B230 with a 96 mm bore, 80 mm stroke and 4 cylinders gives π × (96/2)² × 80 × 4 / 1000 = 2316 cc, that is 2,3 litres.
Cylinder volume and displacement for common engines
| Engine | Bore × stroke (mm) | Cylinders | Volume |
|---|---|---|---|
| Volvo B230 | 96,0 × 80,0 | 4 | 2316 cc |
| Honda K20 | 86,0 × 86,0 | 4 | 1998 cc |
| Toyota 2JZ | 86,0 × 86,0 | 6 | 2997 cc |
| Chevrolet small block 350 | 101,6 × 88,4 | 8 | 5735 cc (350 CID) |
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Common questions about displacement
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