It probably is on the optimistic side. Yet, there are a few key differences with your chevy: - 10 kwh of battery. That's a lot less weight than your car has to

It probably is on the optimistic side. Yet, there are a few key differences with your chevy: - 10 kwh of battery. That's a lot less weight than your car has to carry around. That extra eight kwh would be quite a bit of mass and it doesn't even use all of it. - The batteries are probably a bit more modern and efficient. So, less dead margin like your Chevy and perhaps a bit better energy density. The Chevy was a first generation vehicle that is no longer in production. Even GM thinks they can do better now. - Lightweight construction for the rest of the vehicle. This looks like they are using some composite materials and it's a quite small vehicle that is a lot lighter than your vehicle. The rest is just speculation. But they do market this as an urban vehicle, which indeed suggests speeds of <50km/h. It also means the aerodynamics are less relevant. Those make a big difference at highway speeds but much less at lower speeds. Also, boxy is not necessarily bad for aerodynamics and this box shape has some curves to it still. So, I could see how carrying less weight and better efficiencies might help get this vehicle better range. Probably 200km is a bit optimistic indeed. They do suggest the 30kwh option extends the range by 3x. That seems very unlikely. Adding that much extra weight has got to have an impact; it can't be nothing. But seems like a cheap affordable vehicle for companies to use in cities. I'm sure there's a market for it.