[1][2][3][4] The company was located at Courbevoie on the north side of Paris, but relocated in 1927 to nearby Levallois-Perret following the death of Paul Dupuy, who till then had participated in the running of the business.

In 1920 they were also still involved with Sizaire-Berwick, which may in part explain the three-year gap between the founding of their third automotive business and the appearance of its first car.

Following the second death the business relocated the short distance to Levallois-Perret, and this was accompanied by a name change to Société Nouvelle des Autos Sizaire.

The car was powered by an advanced 1,993 cc 4-cylinder engine with a maximum output listed as 50 HP and incorporating an overhead camshaft.

[2] For the 1928 model year the manufacturer followed up with the Sizaire Frères Six, which was fitted with a six-cylinder sleeve valve engine of 2,910 cc, bought in from Willys-Overland of Ohio.