How come the data was so hard to find? I'd imagine Ferrari of all cars would have had multiple sets of fully fleshed out data. I know nothing of cars though, so maybe this is uncommon.

Is there a possibility that you've even missed one or more cars in this compilation?

The Daytona SP3 isn't there, for example. Probably not the latest F1 car either (although to me it feels like the F1 cars don't belong in this list).