Miles Davis was a cool dude. Him and a few other guys literally invented the concept of coolness. So does this make cars that he owned like this 1967 Ferrari 275 GTB Coupe by Scaglietti the absolute coolest from their day?

Does Miles Davis ownership automatically make a car "sub-zero" in Top Gear parlance?

Yes, in my opinion, it puts them all they way to the mini-fridge all the way to the right of the cool wall.