I can't find the RPM specs on it but it's rated at 2.1HP and it DOESN'T FIT into ANYTHING THAT RUNS NORMAL .21 (or bigger) SIZE ENGINE... It is a TMaxx replacement engine.
So then, less torque than stock, less HP and doesn't fit.... I think that sums it up.
Here are some links for it:
http://www.modelsport.co.uk/?CallFun...n&ItemID=18510
http://www.worldhobby.com/stores_app...&Item_ID=15569