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How does CC define for an engine? How higher value of CC decreases mileage of an engine

CC is a measuring unit of capacity of the engine,
Which is commonly specified in cubic centimeters (cc or cm3).
If an engine has a capacity of say 1000cc or 1000 Cubic Centimeters,
Then the capacity of that engine is 1 Liter.

For e.g.

1000cc = 1000 cm³ = 1 Liter = 1.0L


800cc = 800cm³ = 0.8 Liter = 0.8L

It is a unit of displacement of all the pistons
Inside the cylinders which kept the volume.
For example, if a 3 cylinder engine has a rated capacity of 300 CC,
It means that each cylinder of the engine can suck in 100 cc of fuel-air
Mixture to burn and compress. It means it is the combined capacity for all cylinders of
The engine added together while it completes its one cycle.

Also, read:

How to measure Engine capacity or Engine Volume:

To calculate the volume of an engine you can use the formula

V = π/4 x (D)² x H x N

Where, V = Volume, D = Bore Diameter, H = Stroke Length, N = No. of Cylinders

If the engine has only one cylinder,
Then that lone cylinder will accommodate all the 1000cc or 1.0L of air inside it. Mercedes-Benz MotorWagen is the world’s first automotive single-cylinder engine.

Do CC effects engine performance?

The engine capacity effects on mileage,
Torque and power of an engine.
Because engine capacity is the space available in the cylinder to flow air-fuel for burning. The more the capacity of cylinders more the air sucks through the cylinder.
The volume of the air grows,
The fuel system also proportionately increases the
Corresponding quantity of fuel to the engine.
As the amount of fuel for burning increases,
It also increases the power output.

Also, read:

How engine capacity affects mileage?

Mileage is inversely proportional to the engine capacity. A smaller engine also means lower weight. Having to carry around lesser weight is another way to increase fuel efficiency. In city driving, we have stop-and-go traffic,
And the force needed to move a smaller mass is lower.

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