Sure you could have a really powerfull engine but if it weighs two pounds thats a mute point. I think "power to weight" might be a better comparitory factor, of course your talking with soemone that has a saito. Its really hard though, a lot of engines, like tower even, have 1.6 hp, but no torq. If you want speed Id check out norvels new 40, if you want brute force try out a ys or a saito.