Porsche 924 alloys transplant?!

Does anyone happen to know if the frighteningly similar to the original 9 spokes alloys from an '83 porsche 924 will fit directly on to my '83 GTi? to my (very) untrained eye they appear to be pretty much the same wheel just a little bigger, they are 4 stud so should they just fit right on? has anyone got any fitted on their cars?
Many thanks,
great group by the way!
Shaun
'83 Mars Red GTI

Hi there,
They're 108PCD (same as Audi and Ford) rather than 100PCD, so unfortunately they won't go on………
Sorry !
Mark

ok, thanks for the prompt response! on my old group i literally had to wait for weeks to get a reply!
cheers,
Shaun