This gulf standard specifies a method for testing engines designed for automotive vehicles. It applies 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. It applies only to net power assessment. This standard concerns internal combustion engines used for propulsion of passenger cars and other motor vehicles, excluding motorcycles, mopeds and agricultural tractors, normally traveling on roads and included in one of the following categories: - reciprocating internal combustion engines (spark-ignition or compressionignition) but excluding free piston engines; - rotary piston engines. These engines may be naturally aspirated or pressure-charged, either using a mechanical supercharger or turbocharger.