Is the Buick Regal GS the most important “maybe” of the 2010 Detroit Auto Show? It’s been more than two decades since performance enthusiasts cared about Buick in any meaningful way. The car at that time was the now legendary Buick GNX. Even if the proposed Regal GS makes production... 

Meet the Opel Insignia OPC Sports Tourer. Salient facts: 325-horsepower turbocharged 2.8-liter V6, AWD, six-speed manual, eLSD torque vectoring and it’s a station wagon. Oh, and get this — it’s built from off the shelf GM parts. Incoming search terms:Opel Insignia opcInsignia...