Some may scratch their head as to why this stunning Buick concept car isn’t called the “Riviera,” the name attached to a long line of glorious Buick two-doors. But this is the New Buick, one which looks forward and not back. The Avista, for its part, looks dynamic with its long, 110.7-inch wheelbase and clipped overhangs, and it might actually be dynamic thanks to the engine installed beneath its extensive hood. There resides General Motors/Cadillac’s new twin-turbocharged 3.0-liter V-6, here making a solid 400 horsepower and mated to an eight-speed automatic—and it drives the rear wheels.