The Buick Roadmaster is an automobile that was built by Buick from 1936 until 1942, from 1946 until 1958, and then again from 1991 until 1996. Roadmasters produced between 1936 and 1958 were built on Buick's longest non-limousine wheelbase and shared their basic structure with the entry-level Cadillac Series 65, the Buick Limited, and after 1940, the Oldsmobile 98. Between 1946 and 1957 the Roadmaster served as Buick's flagship. When it was resurrected for the 1991 through 1996 model years, it became the marque's largest vehicle. The Roadmaster sedan, a C-body vehicle over its eight previous generations, shared the B-body for the first time in its history. It was longer with a greater wheelbase than the C-body Buick Park Avenue. It was also larger both in wheelbase () and overall length () than the K-body Cadillac DeVille. A Buick Roadmaster Estate station wagon first appeared in 1947, and was manufactured in several generations through 1996. 1931-1933 The 1932 Series 80 was the first Buick with the OHV Buick Straight-8 engine developing at 2800 rpm. It was positioned as an upper category trim package and shared with the Series 90. The Series 80 was a new approach for Buick by marketing a luxury sedan with an eight-cylinder engine - that became expected from luxury brands - comparably as the Oldsmobile L-Series on the GM C platform. The 1932 models introduced a new high-performance engine developing . In 1933, the styling of all Buicks was updated with a new, corporate "streamlined" appearance shared with all GM cars for that year as influenced to GM's Art and Color Studio headed by Harley Earl. The 1933 models were the first year all GM vehicles were installed with optional vent windows that were initially called "No Draft Individually Controlled Ventilation" that were later renamed "Ventiplanes" for which a patent application was filed on November 28, 1932. The patent was assigned to the Ternstedt Manufacturing Company, a GM subsidiary making components for Fisher Body At the end of 1933, the 80 series was discontinued after 24,117 units were produced. In 1936, the model changed its name to "Series 80 Roadmaster". Body style choices were limited to a 2-door coupe or 4-door sedan in 1931 capable of seating either 5- or 7-passengers, then replacing the coupe with a Victoria 5-passenger coupe in 1932. The 1933 model year saw convertibles for both the coupe and 4-door sedan convertible