Hmm, this is a tricky one.
The good news is that you are correct as it is the Ford Sierra-based Mill Auto Conversions EM500R made in the UK.
However, the bad news is that this puzzle is still in the Rookies section, and as you are an Expert with more than 20 points, you shouldn't be able to answer a Rookie puzzle!
So, perhaps the AutoPuzzle elders can advise what to do now, as I don't think I can award you the point, unless Admin says otherwise. I shall move the puzzle into solved, but Admin advice needed please..