@lou_dias,
Install a x86 MacMini in your car instead. It will run much more OSes and programs that you will need and/or want. I have done it in my car, but have it out at the moment to install a good DC to DC converter with a wiring harness and automatic switch for the MacMini. Combined with a USB GPS antennae it works great for Navigation via Windows as there is no good navigation software for the Mac that I am aware of.