What made me think it was maybe early Beta was what looks like a metal cover for the timing belt, the later Betas all had yellow plastic ones I think, but the engine mounts are definitely not Beta as mentioned, hence wondering if it was an early saloon, but I thought all of them had a similar mounting scheme.
So maybe the engine was transplanted into something else?
The answer is to get the number near the oil filter which would settle it.
Peter