The 3.8L turbocharged V6 engine that powered the Grand National and GNX was a unique creation in an era still recovering from the muscle car collapse. Unlike most performance cars of the time, it didn’t rely on a big V8. Instead, Buick engineered a torquey, boost-happy V6 that could blow the doors off cars with twice the displacement (1987 GNX #51 produced of 547 built - lead photo).