A .91 would but MUCH better. Since this this posting I have added a Saito 1.25 to mine and plane absolutely screams! It's doing nearly 130 mph on it's fastest runs. I'm turning a 15x10 prop on it. Only one problem... Man the landings are hot! The speed this little gem is capable of it outrageous. The great construction allows so serious stress on it. One thing that did happen to me though was the metal elev hinges broke on mine. I ended up pulling them out and replacing them with GP plastic hinges (4 of them in each elev). Since then no problems.
This is without a doubt a plane that provides "need for speed"!

One other mention! Ballance your prop!!!!!!!!!!!