EngineCalc

Engine Displacement Calculator

Bore × stroke × cylinders — what makes a 2.0L a 2.0L.

Bore (mm)

Stroke (mm)

Cylinders

Engine displacement

2.00 L

1,998 cc

What you entered

Bore: 86 mmStroke: 86 mmCylinders: 4

1
Single cylinder volume
(π/4) × 86² × 86 ÷ 1000= 499.56 cc
2
Total displacement
499.56 × 4 cylinders= 1998.23 cc
3
Convert to liters
1998.23 ÷ 1000= 2.00 L

Result

Displacement: 2.00 L

A 4-cylinder engine with 86 mm bore and 86 mm stroke displaces 2.00 liters (1,998 cc).

Displacement in cc and liters for common bore, stroke and cylinder counts

Every row runs the same formula the calculator uses: (pi/4) x bore squared x stroke, in millimetres, divided by 1,000 for the swept volume of one cylinder, then multiplied by the cylinder count. The labels describe typical engine layouts rather than any specific model.

Engine layout	Bore (mm)	Stroke (mm)	Cylinders	Displacement
Single-cylinder motorcycle	100	83.0	1	652 cc (0.65 L)
3-cylinder city car	71	84.0	3	998 cc (1.00 L)
4-cylinder sport bike	76	55.0	4	998 cc (1.00 L)
Compact 4-cylinder	79	81.5	4	1,598 cc (1.60 L)
Square 4-cylinder turbo	86	86.0	4	1,998 cc (2.00 L)
Long-stroke 4-cylinder	89	100.0	4	2,488 cc (2.49 L)
V6 crossover	92	86.0	6	3,430 cc (3.43 L)
Performance V8	93	92.7	8	5,038 cc (5.04 L)
Large-displacement V8	103.25	92.0	8	6,162 cc (6.16 L)
Heavy-duty inline-6 diesel	107	124.0	6	6,690 cc (6.69 L)

The two 998 cc rows make the point that displacement alone does not describe an engine. The 71 x 84 triple is undersquare, with a stroke longer than its bore, which favours low-end torque; the 76 x 55 four is heavily oversquare and built to rev. Bore is squared in the formula, so a 1 mm change in bore moves displacement more than twice as much as 1 mm of stroke. Displacement figures quoted in a model name are usually rounded, which is why a 1,998 cc engine is sold as a 2.0 and a 5,038 cc one as a 5.0. Displacement sets how much air an engine can move per cycle, not its power: forced induction, tuning and rev range decide the rest.

The displacement formula

Displacement = π/4 × bore² × stroke × cylinders. A 86mm bore × 86mm stroke × 4 cylinders = 1,999 cc ≈ 2.0L. Displacement roughly correlates with power output, which is why it's used for engine naming (the '5.0' in a Mustang GT means 5.0 liters).

Bore vs stroke trade-offs

Oversquare engines (bore > stroke) rev higher and favor horsepower — common in sport bikes and high-revving sports cars. Undersquare engines (stroke > bore) produce more low-end torque — common in trucks and diesel engines. A 'square' engine (bore = stroke) balances both.

Frequently asked questions

My engine has an 86mm bore, 86mm stroke, and 4 cylinders — what's the displacement?

About 1,999 cc (2.0 liters). This is the classic 'square' engine configuration. The formula is pi/4 x 86^2 x 86 x 4 = 1,999,148 mm^3 = 1,999 cc.

What does '2.0L' or '5.0L' in a car's name actually mean?

It's the total displacement — the combined swept volume of all cylinders. A '5.0L' V8 has 8 cylinders totaling 5,000 cc of displacement. Larger displacement generally means more power, which is why it's used in model names.

Does displacement determine horsepower?

Not directly — displacement sets a baseline for how much air and fuel the engine can burn per cycle, but turbocharging, engine tuning, and RPM range all affect final power output. A turbocharged 2.0L can make more power than a naturally aspirated 3.5L.