____is the comparison of the volume in the cylinder to the combustion chamber.

Name: ____is the comparison of the volume in the cylinder to the combustion chamber.
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The compression ratio is the comparison of the volume in the cylinder when the piston is at the bottom of its stroke (maximum volume) to the volume in the combustion chamber when the piston is at the top of its stroke (minimum volume). This ratio is a key factor in the performance and efficiency of an engine.

____Is the Comparison of the Volume in the Cylinder to the Combustion