A sort-of Ford Orion Cosworth rally car was developed in the mid eighties by Sydney Meeke Motorsport in Ireland, based on the RWD Gartrac Escort G3. Driven by Steven Finlay, who used to drive for Malcom Wilson's Michelin Pilot team, and (I think) still does the odd bit of testing-development work on the Focus WRC. A couple were produced.
Not sure about this so stand to be corrected, but if memory serves correct the car was powered by either a BDG, or a Hart engine. Cosworth MAY have had some development in the motor, but then again...
The car was featured in an edition of CCC many moons ago, where a guest driver was invited to have a chuck around. I think he was some Brazilian called Ayrton Senna or something.