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this post was submitted on 27 Jul 2023
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Also the efficiency and torque curve of an electric motor is pretty much flat at all speeds, whilst ICE motors are less efficient at both lower RPM (it's not even speed, it's rotations per minute) and higher RPM and there's a sweet spot somewhere in the middle, whose precise position depends on the motor technology (higher for gas, lower for diesel, for example).
The torque also depends on RPM, which is actually why you have gearboxes and those values are in RPM not speed (as the gearbox alters the RPM to speed ratio, exactly to make up for lower torque at higher RPM).
Along with regenerative breaking as you mentioned, this flatter efficiency curve makes EVs much more efficient in stop-and-go traffic than ICEs whose ideal conditions are to be cruising steadilly at around 2500 RPM (for gas, and it also depends on engine) in the highest gear (so at about 100km/h).