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This International Standard specifies a method for testing internal combustion engines for propulsion of road vehicles as defined in ISO 3833. It applicable to the evaluation of their performance with a view, in particular, to presenting curves of power and specific fuel consumption at full load as a function of engine speed.

This International Standard is applicable to gross power assessment.

This International Standard concerns internal combustion engines used for propulsion of passenger cars, trucks and other motor vehicles, excluding motorcycles, mopeds and agricultural tractors normally travelling on roads, and included in one of the following categories:

• reciprocating internal combustion engines (spark-ignition or compression-ignition) but excluding free piston engines;
• rotary piston engines.

These engines may be naturally aspirated or pressure-charged, either using a mechanical supercharger or turbocharger.

This International Standard is primarily intended for the communication between the engine manufacturer and the manufacturer of the vehicle. If used for advertising purposes, the ratings must clearly state that they are gross power in accordance with 9.2.