Sleek. Powerful. Aggressive. Buick? Indeed, all those descriptors and more apply to the Buick Avista Concept. Powered by a twin-turbocharged V-6 producing 400hp, the surprising RWD 2+2 coupe has a wide stance, sporty proportions, and uninterrupted body lines that hint at the car's speed even when still. Inside, there's the requisite futuristic interior, complete with 3D-printed door and seat trim, touchscreen controls for the instrument panel and console, exposed carbon fiber and aluminum accents, and a glass roof.