I asked my local Alfa mechanic who has a GTV, we both came to the conclusion that the seat is slightly narrower, therefore it would look out of place, the brackets for the subframe would have to be completely re-worked, the actual panelling on the side of the seat is shorter, If you sit in a GTV then in a 145, you notice the ape-like driving position of the 145.
Basically if you put GTV seats in a 145 you would be looking through the gap in between the steering wheel and the dash!
Just find a KO'd QV and rinse the seats from it.
Alot more hassle than worth, but if you have aquired them free of charge i dont see any harm in finding out a way of fitting them!
Anything i post is my view, and not those of anyone else. anyone who associates my views with anyone else is a proper spoon....
Chris 'AKA' SuperRockin'MisterMagic!