It would be interesting to know if Ottocar is actually his given name or a nickname he's taken on.
In German - Ottomotor is the original name of a gasoline engine invented by Nicolaus Otto. He didn't build it with cars in mind, but rather to run machinery.
And of course we all know what "car" refers too - Although if Ottocar is Austrian, he'd more likely have given himself the nickname Ottoauto.
Quite a story. Obviously, money is no object for Ottocar to be able to own and maintain the 38 Porsches that he's kept. Sounds like they're all kept in running condition and used on a fairly regular basis. That Miami Blue isn't one of the standard or optional colours for the Spyder, so it's a special order - including the matching key he's got. I'm sure that's not the only upgrade that car has.
One can dream.