IMO before a realistic answer can be given one has to consider what the application is. Sure it would be easy just to do a search and find a HP claim. In most cases it is an exaggerated claim anyways. I think most posters in this thread have gone one step farther and have given thought to suitability. An engine and prop requirements will be different if the intended airplane is a Cub as compared to a Warbird or an aerobatic model or even a Cessna. Another consideration will be available mufflers and how well the engine/muffler combination will fit the intended airplane. Much more to consider then just HP ratings