In the same year a new set of engines were introduced. In 1920 the company sold seven large yachts and 27 motor boats. The yachts were powered by heavy duty Andros T engines, which ran 450 1/min and the smaller boats were equipped with light Andros L's, which ran at speed 800–1200 1/min. The number of personnel was 100 in the boat works and 100 in the engine shop. The production of speedboats started to reduce gradually from 1923. In 1926 a new regulation limited the maximum speed of privately owned boats to 12 knots; having a faster boat needed a special permit. The orders of fast boats almost ceased. The prohibition was ended in 1932. The company received significant orders from Soviet Union for Andros T engines in years 1925 and 1927. The engines were not only for marine use but they were used as power source for a several other applications, such as pumps, compressors, generators, locomotives and motor ferries. A new series of Andros engines was introduced soon after the deepest bottom of the 1930s recession was passed. The output was 10–60 hp at 1000 1/min. The cylinder configurations available were 1-, 2-, 3-, 4- and 6-cylinder options. The most famous ones were the single- and double-cylinder Andros L engines. The engine selection included ten models in 1935. The son of C.S. Andrée, Åke Andrée, became the head of the company in 1931. C.S. Andrée died already in the following year just at age of 59. The commercial Director Erik W. Ingman bought half of the shares of C.S. Andrée. In the beginning of 1934 the company name was officially changed "Ab Andros Oy". Åke Andrée sold 800 of his 1 367 shares to Wiklund family between 1936 and 1938, losing his controlling majority. There were two shipyards in the neighbourhood of Andros. Crichton Yard was at the opposite side of the river and Vulcan right next to Andros. Crichton and Vulcan merged in 1920s creating Crichton-Vulcan, and grew heavily. One of the investments was a dry dock built in 1934–1936 at the other side of the Andros area, right next to Korppolaismäki, and Andros became surrounded by the shipbuilding giant. Andros gave Crichton-Vulcan a right for passage to the drydock through its area.