Zs/civic parts interchangeably?

[sjb801]

Just wondering how much difference/similarity there isbetween the Zs and the civic? I know certain elements are different, namely the engine and underbonnet components but what about the rest?

Also what about other generations of civic? Namely the 5th, 7th and 8th gen civics? How much of these cars are interchangeable?

I mainly ask as there is a 52 plate civic, 7th gen I believe, for spares/repair on the island and was wondering if it was worth buying for parts or not. If there are very few parts in common if it wouldn't be worth it, but would see about grabbing hold of them if it gets broken/scrapped.