Devil's Advocate here... this show takes place in 1934. I think it would be obvious if Dad were tooling around in a bulletproof car. The only person who was driving that kind of car would have been FDR, and his bulletproof Packard Limo was a 1937 model.

It would have been outrageously expensive to own a bulletproof car back in the 1930's, as is further illustrated in your link of an $88,000 BMW.

Darling daughter requires the aid of suspended disbelief in this tale, for even if she weren't the dryest match in the box, she'd HAVE to notice that Daddy's car was awfully different from the Lombardo family next door (sorry, OTR humor).

I'm also another person who never watched the Soprano's. Sounds as though the writer's of the show were trying to humanize the "family." I should watch it one of these days.