The good news is that this thing flies in the face of every other electric vehicle design. Batteries are heavy and expensive, so EV manufacturers work hard to reduce resistance (displacement) compared to combustion engine vehicles. Otherwise, the batteries get into this vicious cycle of more weight leading to more cost, and then more weight and cost again as the batteries need to move themselves as well as the rest of the car/boat.
Now these guys want to maximize displacement? Not happening without a dramatic not-yet-on-the-horizon battery advance
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