Where would he get the rubber for the tires and gaskets? How would he make the necessary steel components without machine tools? Where would he find petroleum? How would his craftsmen be able to handle the high temperatures and pressures involved in refining gasoline?Eframepilot wrote:I find it very hard to believe that the prince in the above scenario would be incapable of building a simple Model T given the schematics and personnel you provided to him. Sure, it might take up to a few decades, but the components of the Model T were not particularly complex - this isn't some 2005 Ford Explorer with microchip-controlled fuel injection and GPS navigation. It's not for nothing that the first automobiles were called "horseless carriages". With the proper instructions, the blacksmiths and other craftsmen of the time would be able to create all necessary parts, and putting together the actual vehicle from there would be easy.
Assuming by some act of magic he could get the rubber and oil (and that's a hell of a generous assumption), the real bottleneck is the lack of machine tools. Medieval blacksmiths are not going to be able to replicate machined parts to the tolerances required by a Model T. I'd love to see a medieval blacksmith try to bore out a cylinder. You can't build a car, even a simple one, without basic tools like a drill press or a lathe.