Alfa is owned by Fiat, however so is Chrysler. I feel as though the Fiat brand was brought over because of the relative lack of entry in the stylish accessory car market. However it appears that Chrysler will be phasing out some Dodge cars in favor of Alfa in the near future (Jesus, please take the Avenger).
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Much needed makeup. Particularly on the interior. Nissan interior is underwhelming.
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100% true
Indeed, but really a face-lifted Honda.
Prior to 2009 you're 100% right. Now they only have some of the same parts, but the designs are completely different.
Probably true but a major insult to Ford.
Depends on the model. The designs are usually a lot different, but they are based on a collection of platforms. The Cadillac ATS, Buick Verano, and Chevrolet Cruze are based on the same platform, but the Cadillac and Buick are 100 times better than the Cruze.
Lexus and Acura are blatant uses of badge engineering, but Audi and Cadillac are not at all (especially since GM was under so much fire over the last 20 years over badge engineering).