So... I'm 2 years late about this, maybe it's been posted here before, but still it's amazing clip.
I'm not aware they use siren all the way up the top. At first I thought this is just a simple warning that the car is on its way, but then again I suspect something, what if the siren is a deliberate cover to mask the sound of the electric motor? Pretty sure competing engineers can analyze the motor sound and noted what methods needed to run said configuration... I don't know, maybe I read into it too much.
Just wondering about the power rating, do you just... Multiply electric motors like that? The YouTube videos shows a total power of 1050 from 4x 260HP electric motor. So for example an 8 wheel, each with 100 HP electric motor is 800 HP?