Aside from the nicely-placed Roundels, I have a feeling this may have a straight-six dropped into the engine bay. Since the OEM parts supply is nearly nonexistant (see comments here), this would make an excellent candidate for a swap. I would love to know more about this particular car.
Come to think of it, the engine/driveline from an e30 Xi would be quite apropos, albeit spendy.
Santa Fe, NM
Photo: Bill Stengel