Its wierd its older but wierd it may be a mix match of hpi/kyosho/tamiya i see different parts all over it from different models that I've looked at. But motor looks to be a standard kyosho motor
Yeah thought it was an rs4 until frog posted the kyosho i forgot about them and that definitely seems a fit i think finding a part number on the chassis or something is the best bet there should be id or info SOMEWHERE on it even if its stamped on the inside of the gear box