compression ratio
Also found in: Acronyms, Encyclopedia, Wikipedia.
compression ratio
n.
In an internal-combustion engine, the ratio of the volume of the combustion chamber measured before and after a compression stroke.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
compression ratio
n
(Automotive Engineering) the ratio of the volume enclosed by the cylinder of an internal-combustion engine at the beginning of the compression stroke to the volume enclosed at the end of it
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014