It takes what it ta
It takes what it takes in torque or HP to maintain a speed with the throttle in a stuck or fixed position on a flat road. If you encounter a hill the speed will decrease because the load is increased and the throttle position stays the same. It doesn't make more torque or hp unless you open the throttle to maintain speed when a hill is encountered. Same would be true for applying the brakes with the throttle in a stuck position. It doesn't matter if it's a slant six producing said horsepower or a motor capable of 1,300 horsepower. The amount of torque or HP the brakes have to overcome is the same. The motor is only producing the torque or hp needed to maintain the speed the stuck throttle is allowing it to achieve.