Depends on engine most. 5 door vs 3 is a difference of about 60 kg - 3 door is 60 kg lighter overall.
For example 1.6 sohc is about 1070 kg (5 door), and 1.9TD is 1310 kg (also 5 door). It differs more in relation to engine and trim level then to 3 door vs 5 door.
Thanks for the reply. I dont care about the overall weight, only the body shell. As I understand it, the 3 door is heavier than the 5 door due to reinforcments made to the shell to comply with improved impact standards.
I was talking about Mk1 hehe Well, as I said.... difference is maybe up to 60 or 70 kg at max, no more. Too small to matter for much anything? It would be much easier if I knew for what are you needing the info