Mood swings in people aren’t fun to deal with, especially when emotions vary to a large degree. Mood swings in the 2017 Alfa Romeo Giulia Quadrifoglio are quite the opposite, giving the high-performance sports sedan a split personality that would make Dr. Jekyll envious. For the Giulia, the personality quirk is buried in its DNA – or rather Dynamic, Natural, and Advanced Efficiency settings found on the rotary dial affixed to the center console. Yes, the Alfa has multiple personalities; that much is true. But to call it a personality disorder would be a great misdiagnosis.