Effectively, a wide-stance three-wheeler or (reverse) trike has the same footprint as a four-wheel hatchback. Can't emphasize enough that a trike needs to bank to be able to deal with lateral forces whilst cornering. Then you can keep the body as lean (narrow) as in your next article about vehicles like the Carver.

But why stop at that? A lean, self-balancing three-wheeler may make for the perfect self-driver. https://medium.com/predict/silicon-valleys-biggest-challenge-yet-d2f76ef9e090