The Allen was an American automobile built in Fostoria, Ohio between 1913 and 1921. The company used 3.1 liter four-cylinder side-valve Sommers engines, and acquired said company in 1915. The 1920 the Allen 43 was made, featuring bevel-sided touring coachwork and a high-shouldered radiator. Ultimately, sales of this vehicle were not enough to avert the company's bankruptcy, which followed in 1921. Willys acquired what little was left. In total, 20,000 vehicles were sold.

Overview of production figures Year Production according to Seltzer, Lawrence H. Production Model Serial numbers Engine displacement HP 1913 137 36 1914 750753 40 2000 to 2753 5309 cc 27,2 1915 2.250 (753) 40 2000 to 2753 5309 cc 27,2 ↑1734 33 3501 to 5235 4344 cc 19,2 ↑(1734) 34 3501 to 5235 4344 cc 21,4 ↑(1734) 35 3501 to 5235 4826 cc22,5 ↑(1734) 38 3501 to 5235 5309 cc27,6 1916 5.5005.521 32 6000 to 115214826 cc22,5 ↑(5.521) 37 6000 to 11521 4826 cc22,5 1917 4.3704.458 Classic 11522 to 15980 4826 cc 22,5 1918 3.6003.507 New 41 18001 to 21508 4826 cc22,5 1919 3.900(3.507) New 41 18001 to 21508 4826 cc 22,5 1920 2.5004.742M-43 50000 to 54742 4505 cc19,6 1921 6001.316 M-43 54743 to 564454505 cc19,6 1922 50386 M-43 54743 to 56445 4505 cc19,6 Sum 23.52022.554

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