Porsche and Subaru share a special corner of the automotive market, being the only brands that really stake their reputations on flat engines. They’re not the only automakers to ever put a boxer to work, as we’ve seen these engines in a number of Citroëns, Alfa Romeos, and Volkswagens. But no other major automaker has really bet on the flat configuration in the way that Subaru and Porsche have. So, when you think about it, it’s kind of weird that these two brands don’t collaborate more often.
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