octane number definition

  • noun:
    • A numerical representation of the antiknock properties of engine fuel, in contrast to a regular research fuel, such as for instance isooctane, which includes an octane wide range of 100. Also referred to as octane rating.
    • a measure of the antiknock properties of an automobile fuel; isooctane having an octane number of 100, a fuel with the same antiknock properties as a mixture of 90% isooctane and 10% heptane having an octane number of 90
    • a measure associated with the antiknock properties of fuel

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  • Definition for "octane number"
    • A numerical representation of the antiknock properties of…
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