Long before Riviera meant a swoopy two-door coupe, Buick used the name on this formal, chrome-heavy 1957 Super four-door hardtop, powered by the distinctive 364 cubic-inch Nailhead V8. Small styling cues like four VentiPorts per fender and chrome rear chevrons quietly told other drivers exactly how much Buick they were looking at. Read on to find out how Dynaflow made this Super feel smoother than any geared automatic of its era.