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The compression ratio is the ratio of the volume of the cylinder and the combustion chamber when the piston is at the bottom, and the volume of the combustion chamber when the piston is at the top. Automotive engineers can improve fuel efficiency and fuel economy by designing engines with high compression ratios.
The first complete Irving-Vincent, displacing 1299cc via a 92x97.7mm undersquare design with a sky-high 14:1 compression ratio to run on a methanol mix, debuted in 2003 at the Geelong Speed Trials with around 135 hp. It also stumped out an impressive 110 lb/ft of torque. And that was only the beginning.