Here is a very simple example on how to differenciate between torque and power.
'Think of slowing a free-spinning tire with your hand. Feel the tug on your palm and the tension in your arm? That's a measure of torque, the torque the tire experiences as a result of your palm slowing it down. Feel the heat build up from friction? That's a measure of power.'
The Continuously Variable Transmission (CVT) has the ability to maintain the rpm at any given driving situation (example - from a steady pace to an uphill pace) eventhough it has reached it's maximum torque. Traditional automatic transmission would need to shift it's gears in order to go through those road conditions.
I would say for CVT, you would want to run at max torque as there's less friction to use max power.
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