[LittleGSEclipse]

Keymaster is pretty much right.

A 2.0 Liter 4cylinder displaces half(0.5) a liter of air/fuel mixture per cyl
A 5.0 Liter V8 displaces 0.625 per cylinder

And as we all know in the combustion chamber is where compression and combustion take place when the piston moves up and down the size of the chamber changes.It has maximum volume and minimum volume the difference is called "displacement" ,the displacement is measured in CC's

a 2.0L =2,000 cc's
a 5.0L= 5,000 cc's

Generally the displacement tells you something about how much horse power and engine can produce. Roughly a 2.0L engine produces half as much horsepower as a 4.0L engine. You can make more displacement by making the combustion chambers of all the cylinders bigger .

Now yes there are alot of variables as far as how fast a particular car would be, mods,weight,tuning, etc etc....But this is just to give people a rough idea as to how displacement works and how to calculate displacement.

Hopes this helps you guys.