When Polydrops places its P21 behind that same Model Y at 55 mph, its drag comes out to 119.1 pound-force and is an impressive 65.2 pound-force drop compared to the best of the three traditional ...

But, unlike its predecessors, this flagship model is roomy enough to sleep four and packs a ton of off-road and tech-forward features. Stepping inside, the P21 is taller than it looks, with a full ...