My first 2 cars were Fiats and through them, I learned the necessary basics to work on most of the cars I've had through my life. I currently have a '77 Fiat 124 Spider. It is heavily laden with smog stuff and very underpowered. Quite a dog compared to my '72, but still fun. So, that's 3 for me.
My Dad has a '72 124 Spider with 40,000 original miles and a '72 Coupe. I will probably get this wrong, but he's had 6 previous 124 Coupes (he is partial to the coupe), 3 124 Spiders, 1 128 wagon, 2 X1/9s, and a 1959 Fiat 1100. That's 14!
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My uncle had a '72 128 Sedan that he bought new.
My Grandpa had the '72 124 Spider that my Dad currently owns.
Total: 18
Beat that.
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Bob