Surely it's possible, but I haven't done the math. As quick test, I'd configure two sets of parameters for the Engine block, then linearly interpolate the parameters between the two sets.
The relationship between rpm, torque and power is simple:
power = torque x rpm
Just convert all the magnitudes to SI units for the numbers to match.
However, the engine curve model in VPP doesn't allow to specify the torque and power directly, but as result of the sum of two curves: drive torque and brake torque. This may make difficult to find a proper formula.