Buick dropped jaws at the 2015 Detroit Auto Show with the Avenir concept, a taut, evocative four-door with muscular rear-drive styling. It’s dripping in modern American class—not kitschy retro frippery, but rock-solid class and substance. Which is why it might surprise you that the Avenir was penned nearly 10,000 miles away from Buick’s home in […]