Did You Know?: Compression Ratio
Every engine has a specific compression ratio. The air-fuel mixture is compressed in the cylinder to create an ignition, the force of which depends on the compression ratio: the volume of the cylinder when the piston is at the bottom of its stroke versus the volume of the cylinder when the piston is at the top of its stroke. Incidentally, you should know that engine displacement refers to the total capacity of all the pistons during a complete cycle.
