Here are the rules. It must be a car. Not a truck. Not a SUV. Not a crossover. Not a minivan. Furthermore, no chauffeur-specials. Long wheelbase editions of cars like the A8 are okay, because they still aren’t primarily designed to chauffeur. That means no Bentley Mulsanne, no S600 Maybach, etc. I’m pretty sure the longest American car is the Lincoln MKS at a (stunning) 205.6", so let’s see.