Just to muddy the water even more - Haynes give 1060kg but that's UK spec HPE carburettor.
Later cars have a larger radiator, bigger bumpers, fuel pump etc etc which add a little more weight.
If you are talking about Brian Longs "blue" book on the Lancia beta range the ie HPE on page 69 is in Cwt so 22.3Cwt = 1132.8kg.
Best place to check is in the blue Lancia hand book that comes with the car - if you have one.
Then again that may even be wrong!
Add all the weights you have seen and divide by however many to get an average - best your going to get
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