For 1930 Maurice Gaultier designed an 8-cylinder in-line 4,061 cc, evolving the type D8 into the type D8 S (S for Sport). The D8 was the pinnacle of the marque. It was offered in three wheelbases, "S" or "C" at , "N" at , and "L" at , all powered by a () straight eight, making it capable of . Delage followed in 1932 with the Grand Sport, on a in 1934) wheelbase, capable of . But the backlash of the economic crisis of 1929 arrived and manufacturers of luxury cars all over the world suffered from poor sales. The commercial and financial situation of the firm was badly shaken. In 1932 Delage introduced the type D6-11 (6-cylinder 2101 cc), and two years later the new eight-cylinder Delage, type D8-15 (2768 cc). These two models, equipped with independent front wheel suspension did not increase sale figures. The transverse leaf and wishbone independent front suspension was licensed by Studebaker for their cars. Delage also produced a very limited number of higher-performance D6-11S models during 1933 and 1934. These "S" models ("S" being an abbreviation for Surbaisse, which means "lowered" in French) were built on a lowered and shorter chassis. The junior D6s shared Delahaye front suspension design, but had hydraulic rather than Delahaye cable-actuated brakes, also shared the Cotal gearbox with the D8. The D6/70 of 1936 was powered by a () six, the 1938 D6/75 a 2.8-liter six, and the postwar D8/3L Olympic a 3-liter six. At the bottom of the range was a 1.5-liter four that lasted until 1936. Financial pressures never disappeared, however, and during the Spring of 1932 Louis Delage was obliged to take out a 25 Million franc loan in order to finance the tooling needed to put the D6 into production. It was at this time that he also entered into negotiations with Peugeot about using their dealership and service network. These negotiations went nowhere, and discussions with other possible partners/rescuers also came to nothing. There were also personal problems involving his marriage which necessitated a rearrangement of Delage's personal finances, although in the event it was the sale of his expensive home in the Champs-Élysées that reduced the pressure on his finances if only in the short term. The last models to emerge from the factory in Courbevoie were the types D6-65, D8-85 and D8-105, designed by engineer Michelat. On 20 April 1935 the