I've always heard from people Smarter than Me a properly adjusted gas motor will make as much power as the some motor on alcohol. http://www.journeytoforever.org/biofuel_library/ethanol_manual/manual1-2.html Here is a good site or Alcohol as a fuel.In the article it talks about when you adjust to the correct Air fuel Ratio they basically produce the Some btu's so Should make Close to the Same power when each is adjusted right. Alcohol is just easer to get there and stay there.