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The power to weight ratio for a given engine size is a useful parameter to use when comparing aero engines. Some popular makes are tabulated below:
|Make & Model||Displacement cc||Power to Weight Ratio bhp/kg||Two/Four Stroke|
|OS FS-120S III||19.66||2.26||four|
|OS FS-91S II||14.94||2.45||four|
|Super Tigre GS-40||6.39||3.09||two|
|Super Tigre GS-45 ABC||7.53||3.85||two|
This should only be used as an indicator. However, may be used if you're choosing between manufacturers for the ultimate engine.