Too many variables. Wing chord and thickness, surface area, wing loading, drag, etc. Then there's performance. A Tiger Moth will fly right with a .61 while a similar size and weight Ultimate biplane would need a 1.20 to meet the designed flight envelope. We lately tend to over power our models compared to 25 years ago. No one expected an airplane to torque roll or fly rolling harriers or have "unlimited vertical".

Some models fly on the wing and others on the prop. The thrust needed to actually lift off and fly is much lower than what is needed to hover or accelerate vertically. Most "peppy" sport models can take off and loop at 1/4 throttle, so the power needed depends on the type of flying you intend to attempt.