Quote:in a literal sense yes, in a practical sense the higher the compression the higher octane levels are required.

That's to prevent knocking, high octane fuels are more resistant to combustion and thus more resistant to knocking which is essentially uncontrolled combustion. A proper engine management system can pretty much keep any engine from knocking regardless of power or fuel type. You can fill a Ferrari with regular fuel and it'll run just fine because the EMS will compensate.

 

Where high octane fuels might benefit this engine is with the supercharger. Since the fuel is more resistant to knocking the charger pressure can be increased without running the risk of knocking.

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