It work today one of my fellow tech's was talking about how he thought that the LS9 that is in the ZR1/CTS-V is the worlds most technologically advanced engine. I was laughing inside but asked him why, he mentioned the smooth cylinder deactivation. He is a very pro-american vehicle type of guy even though we are an import repair shop, I quickly said the first motor that came to my mind which is the Quad Turbo W16 in the Veyron. He said yeah but its over a million dollars. So I know he isn't right, and I'm probably not either. I also know that there is no definitive answer. But this got me interested in other peoples opinions. What do you guys think is the worlds most technologically advanced production car engine? I vote W16. Also please give some reasoning. I will add mine when I get off work.