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jaspal rautela • Jul 15, 2012

# What does CC in Engine Capacity Mean?

When we say that a car has a 1150cc engine, what does it means? Why do people keep referring to the cc when looking for good vehicles? Please explain this term.
zaveri • Jul 16, 2012
"cc" stands for cubic centiliter. it is a unit of measure for volume.

As far as engines are concerned , then cc indicates the volume of the cylinder bore(in case of single cylinder engines).

as for multicylinder engines , the numerical value of cc indicates the sum total of all the cylinders(though the volume of individual cylinders may not be mentioned).
zaveri • Jul 20, 2012
hey guys feel free enough to post anything here
mechky • Jul 21, 2012
jaspal rautela
A car have 1150cc engine, what does it's means??
zaveri
"cc" stands for cubic centiliter. it is a unit of measure for volume.

As far as engines are concerned , then cc indicates the volume of the cylinder bore(in case of single cylinder engines).

as for multicylinder engines , the numerical value of cc indicates the sum total of all the cylinders(though the volume of individual cylinders may not be mentioned).
Since 'cc' stands for cubic centimeters, everyone regards it to be the volume of cylinder. But actually it is the Displacement volume of a cylinder(in case of single cylinder engine). In other words it is the volume of the piston travel from TDC to BDC. It does not includes the clearance volume or the volume of the combustion chamber. The cylinder volume for a single cylinder engine is higher than the 'cc' of the engine.

A 1150cc engine basically means that the sum of the displacement volumes of all the cylinders is 1150cc.

Also the 'cc' specification for any engine is rounded off to nearest value. It is never exact. For example, Maruti 800 had 796cc engine but it was always regarded as an 800cc engine car.
venkatking.v • Jul 21, 2012
Y do customers always refer high cc engine..?
Kaustubh Katdare • Jul 21, 2012
Tagging gohm , he might tell you why people opt for higher CC engines 😀
mechky • Jul 21, 2012
venkatking.v
Y do customers always refer high cc engine..?
Actually it is a general notion among people that a higher cc engine is a better one. This is because not everyone is a mechanical engineer or knowledgeable of IC engines. Even a lot of mechanical engineers don't know about it.

Though there is no direct proportionality, but a higher cc engine will produce more power output and will have less fuel economy. So if fuel economy is major priority then a lower cc engine is more appropriate and if power is the major priority then a higher cc engine is required.
zaveri • Jul 22, 2012
oh yes i forgot to mention that the clearance volume is not counted.

venkatking.v

Since most customers are laymen, they believe that higher the cc, the higher will be the power as well as the overall vehicle performance.

but they are right only as far as the power is concerned. cc does not in any way affect vehicle performance, and besides higher cc engines are fuel guzzlers
gohm • Jul 26, 2012
Keep in mind that it is only typically that higher displacement engines are less fuel efficient but that is not always the case. Fuel/air mapping, gearing and also application can have a large impact in both efficiency and performance. So does the layout. A 650 cc single will have difference performance characteristics than a 650 cc twin or inline four as an example.
Sourabh123 • Aug 17, 2016
BMW M4 f82 coupe, Bi-turbo, 6cyl, 431hp, 550nm
what does Cyl, Hp and nm do in cars ?
Speed of car depend on what ?
Cyl- Denotes cylinders- No of cylinders present in a engine to produce described output.
Hp- Horsepower(BHP-Brake horse power) power output of the engine or max power that can be achieved by a engine.
Nm-Newtonmeter is an SI unit for denoting power output same as HP.

What is BHP, PS & NM in automobile? - Quora
Shashank Moghe • Sep 12, 2016
zaveri
oh yes i forgot to mention that the clearance volume is not counted.

venkatking.v

Since most customers are laymen, they believe that higher the cc, the higher will be the power as well as the overall vehicle performance.

but they are right only as far as the power is concerned. cc does not in any way affect vehicle performance, and besides higher cc engines are fuel guzzlers

When you say that higher cc engines are fuel guzzlers, you compare them with lower cc engines. But higher cc engines are producing greater power too. An ideal comparison point should be fuel consumption versus IMEP. Higher cc engines have greater surface area (hence lose a lot more heat to the surroundings than lower cc engines) and greater contact area with the piston (higher FMEP than lower cc engines) that eat away from the IMEP. But again, they have greater fuel injected and hence produce more power too! In short, my point is that when its blatantly said that higher volume engines are fuel guzzlers or (worse) inefficient, we do not capture the reality. Their purpose is to produce greater power and you cannot produce more power without providing for a greater fuel intake!

As a side-note, cc affects vehicle performance immensely! It is not clear what you intended to imply there.
swaminathansami • Oct 1, 2016
jaspal rautela
When we say that a car has a 1150cc engine, what does it means? Why do people keep referring to the cc when looking for good vehicles? Please explain this term.
CC means cubic cylinder.its about an engine size.whenever your engine cylinder size (cc) increases your vehicle speed also increases.if you see TVS 50 having 50cc so the speed of vehicle was low.but for example pulsar 220RS means its having 220cc so the speed of vehicle having more.
Shashank Moghe • Oct 17, 2016
swaminathansami
CC means cubic cylinder.
Nope, that is not correct.

swaminathansami
whenever your engine cylinder size (cc) increases your vehicle speed also increases.
Incorrect again. Compare Marine engines (as an example Bergen B33:45L diesel engine) versus the pulsar 220 cc, in terms of speed (750 rpm versus 8500 rpm). Then compare them in terms of power (3600 kW versus 16 kW).
Ankita Katdare • Sep 12, 2018

I found a really interesting GIF https://en.wikipedia.org/wiki/Engine_displacement

Engine capacity is also known as Engine Displacement.

One complete cycle of a four-cylinder, four-stroke engine. The volume displaced is marked in orange.

Therefore, Engine CC means the unit of measuring the volume of a cube having size 1 cm X 1 cm X 1 cm, specified in cubic centimeters (cc or cm3).

What is CC in Bike or Car?

Whenever you go to buy a new car or a new motorcycle, you ask for the engine capacity. Why is that? Because the Engine CC determines the various outputs of the vehicle like torque, mileage and engine power.

The capacity of the engine is the volume of the cylinder. Imaging a big pot. The bigger the pot, the more water it can accumulate. Similarly, the bigger the cylinder volume, the more is its capacity to accommodate air-fuel mixture for burning.

If anyone has a good image to share the actual diagram, please share it below.