reviving the "phaeton" nameplate again, and additional manufacturing locations opened across the country under the Buick-Oldsmobile-Pontiac Assembly Division. The equipment levels and refinement of materials used were on par with the top-level Limited and was a contender with the Packard Eight. 1936–1937 The origins of the Roadmaster name date to 1936 when Buick added names to its entire model lineup to celebrate the engineering improvements and design advancements over their 1935 models. Buick's Series 40 was named the Special, the Series 50 became the Super, the Series 60 was named the Century and the Series 90 — Buick's largest and most luxurious vehicle — was named the Limited. The Series 50 was retired, but new for the model year was the Series 80 Roadmaster. The 1936 Buick sales brochure describes "It literally named itself the first time a test model leveled out on the open highway." The terminology "Series 60" and "Series 70" were shared with Cadillac, while "Series 60", "Series 70", "Series 80", and "Series 90" were shared with Oldsmobile. The Roadmaster was introduced in a year when Buick's overhead valve straight-eight engines were heavily revised. Buick reduced the number of engines from four sizes to two: a 233-cubic-inch, 93-horsepower version for the Special, and a 320.2-cubic inch, 120-horsepower engine for the other series. Buick also adopted an all-steel "turret top" and hydraulic brakes. Coil springs were used in the front. The Roadmaster sedan weighed 4,098 pounds, about 88 pounds more than Cadillac's new Series 60. The sedan sold for $1,255 ($ in dollars ), $440 ($ in dollars ) less than the least expensive Cadillac. The only other body style was a four-door convertible phaeton, priced at $1,565 ($ in dollars ) (a total of 1,064 were produced), at a time when a Cadillac in the same body style sold was priced from $2,745 ($ in dollars ). Buick sales went from just over 48,000 to nearly 158,000, with the new Series 80 Roadmaster contributing 16,049 units to that total. Buick was the only GM car, along with the Chevrolet Standard, to retain the basic 1934 styling for 1935, thus the 1936 re-style brought Buick up with the rest of the GM marques. For 1937, Buick moved to newly re-styled bodies along with all other GM cars. The Roadmaster gained a divided grille with horizontal bars. The center section of the grille was painted to match the body