What type of radio came in a '72 2.0? Were Motorola radios used?

Yes, but not nearly as common as Blaupunkt or Sapphire. It was also most likely installed @ the dealer & not the factory.

'twas maybe a Blaupunkt Sapphire. Check your glovebox owner's manual for photos to be sure

Any idea how to find what specific radio came with my car?

Only way I know is to have a copy of the original bill of sale & see what the dealer did.

Was there a '72 2.0?

Wow, I missed that
Actually, a 72 2.0 is more commonly known as a 914-6

Most radios were dealer installed to pump their margin. Harvey Weidman could answer this. He was the parts manager at Sierra Porsche-Audi in the 1970's...

What ever was available at the dealership. Most cars came with the antenna installed and the dealer took it from there. Could be anything from a Audiovox 8 track, Blaupunkt, Becker, and Motorola.

Oops, my mistake '73 2.0 4 cylinder. Car I am in the process of acquiring. My first experience with 914's; been around Porches for the last 25+ years! but no 914's, so lots to learn. I ask about Motorola because when I dug this car out of storage there was an old Motorola radio sitting on a shelf near the car, which currently has a later model radio installed. Have no way to know if the Motorola was original.

Antennas were a dealer add-on, too. That's why the locations vary, not only which side they're on, but fore and aft and how they sit on the fender.

The Cap'n