It's possible to build a control system and inverters for an electric vehicle that don't spam RFI everywhere, it won't be anywhere near as small, as all the filtering required is going to be quite sizeable. (And no, I'm not suggesting using analog/linear systems, that would be silly huge and get super hot)

The motors are brushless, so if all of the drive power is low frequency and well filtered, it'll be nice and RF quiet.