Mk1 was the 6 light (think thats right) shell. In the mk2 the XR4i was a 5 door Dohc in the UK and 3 or 5 Door in Europe. But the 3 door shell was the single rear side window as in the 3 door cossie shell. Euro 3 doors also got the wind deflector on the side rear pillar, the black bit you can see on mine.