The engine throttle is fully open, and the power, speed, torque, friction and inertia losses are in the highest and lowest gear.

If the throttle valve is fully open, the engine can reach the highest speed and output the maximum power and torque. As for the actual output power and torque, it depends on the load. The difference between high-grade cars and low-grade cars in actual driving is only the difference between large load and small load. The engine with large load has large power output, and the engine with small load has small power output.

As for the torque of the engine, the maximum torque of the engine is not at the maximum power at the rated speed, but at the maximum power. If the load continues to increase, the engine speed will decrease and the torque will increase. For example, when a car climbs a high slope, the engine will send out the maximum torque.

As for the torque of the driving wheel of the car, it depends on the speed ratio of the gearbox. The greater the speed ratio, the greater the output torque.

In addition, I will tell you an energy-saving method, that is, opening a high-grade small throttle will save fuel.

Supplement: I don't know whether the torque you are talking about is engine torque or driving wheel torque, so I can't answer your question directly. I just explain some basic professional knowledge from the aspects of engine load characteristics, torque characteristics and deceleration and torque increase. If you can understand it, your problem will be solved.