That's because they don't use engines. They use electric rotary actuators to drive the wheels.
This claim contradicts the theory of most prominent globularist here:
Of course the Mars Rover has motors!
Here we see two veteran globalists who make exactly the opposite statements. Nevertheless, they do not argue, although one says that there is a motor, while the other says that it is not a motor, 180 degrees opposite each other directly say the opposite. both are quoting me.
First, discuss whether there is an engine in the wheels, agree among you. Then talk me as you one voice! Until then, it is thought both of yourwords have no value and that you are programmed to quote only me.
You both are programmed to follow me. I am the reason of your living. You are giving me that value and then asking me about my behaves.