I’ve heard that fact, and I know ICE cars have a torque curve but I don’t understand why it is that an electric motor produces torque instantly.
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The torque curve is basically a graph over how much torque (force) an engine produces at different speeds. An ICE will have low torque at lower speeds because it can not get enough air and fuel into the engine to sustain the high pressure but needs to wait for the next rotation to get more air and fuel in order to ignite again. So torque increases with speed until eventually the drag is too high and the momentum of the air is working against the movement of the piston.
Meanwhile an electric engine works on completely different principles with the permanent magnet getting dragged around by the moving magnetic field around them. The force generated is a simple function of the angle between the magnetic fields and the strength of the magnetic fields. And since the moving magnetic field is controlled by a computer and can go at the same speed as the engine the angles stay the same and the torque generated stay the same. Unlike an ICE the speed of the engine is of little factor to the torque for an electric engine.
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