The 1920 “Ryjan HJ4” sat on a 3,000 mm (118.1 in) wheelbase and was priced by the manufacturer at 21,000 francs for a four-seater ”Torpedo” bodied car and 25,000 francs for a four-seater “conduite interieure” (closed sedan/saloon/berline) bodied car.[4] The engine was a 4-cylinder 2,292cc unit.[4] Other sources indicate that early cars used a 1690cc engine bought in from S.C.A.P. (Société de Constructeur Automobiles Paris), a specialist engine manufacturer located nearby.
Five years later the manufacturer took at stand at the Auto Salon in October 1924. This car still had a S.C.A.P. engine, now of 1,614cc: customers were able to choose between a sidevalve and an overhead valve version of this engine. The 1924/25 car sat on the same 3,000 mm (118.1 in) wheelbase as before.[5] The manufacturer's listed price for a four-seater ”Torpedo” bodied car had increased to 27,000 francs, however, reflecting general inflation in the French economy.[5]
For the last two years the cars were also advertised with a 2-litre engine from "Altos", another engine supplier. Production ended in 1926.
