With touches of retro-Buick styling cues, like classic portholes and waterfall grille, the futuristic Signia was created to tease the public, and serve as a catalyst for change. Based on the architecture of the Park Avenue luxury sedan, Signia was finished in metallic-ochre paint with dark gray-bronze accents. Propulsion came from a 240 horsepower, supercharged 3.8-liter Series II V-6 engine, which drove the front wheels through an electronically controlled four-speed automatic transmission.