nounMeasurementsOther measurements used in the automotive industry include:BHPcetane numberhorsepowerspring rate ( Automotive engineering : Fuels, oils, emissions, and other fluids ) The octane number
of a fuel, especially
gasoline, is a measure of its anti-knock properties.
Gasoline characteristics that have an important effect on engines and emissions include
its octane number and chemical composition.
Gasoline is classified by its research octane number (RON). In Britain standard unleaded gasoline is 95RON.
The octane number represents a fuel's ability to resist engine knocking.
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