octane rating

Noun

Meaning

a measure of the antiknock properties of gasoline

Synonyms

Hypernyms

Examples

A higher octane rating allows a higher compression ratio or supercharger boost, and thus higher temperatures and pressures, which translate to higher power output. Source: Internet

Ethanol has a higher octane rating compared to regular fuel and has an internal cooling effect on the combustion chamber, which allows increased performance. Source: Internet

Fuel economy and emissions The shape of the Wankel combustion chamber is more resistant to preignition operating on lower- octane rating gasoline than a comparable piston engine. Source: Internet

It is possible to manufacture gasoline engines with compression ratios of over 11:1 that can use 87 (MON + RON)/2 ( octane rating ) fuel with the addition of variable valve timing and knock sensors to delay ignition timing. Source: Internet

Once the leading source of fuel, its low octane rating required lead additives. Source: Internet

The octane rating of propane is relatively high at 110. In the United States the propane fueling infrastructure is the most developed of all alternative vehicle fuels. Source: Internet

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