The electric motor of the TCH is theoretically alot more powerful than 40 hp -- it's the battery that outputs 45 hp, whereas the Prius battery only outputs 28 hp. So in EV mode, where the battery is the sole source of power and the engine is generating none, the Prius is 28 hp and the TCH is 45. But the TCH is much heavier than the Prius and I think it has only a slightly larger battery pack, so its range and/or maximum EV-only speed is more limited than the Prius'. Still, with 61% more horsepower but just around a 22% weight increase, it should accelerate quicker in EV mode than the Prius does.