The success that Hispano-Suiza cars were enjoying led to an important step in the company’s history. Both Birkigt and Mateu were convinced that the construction of a second factory in France (at Bois-Colombes near Paris) would increase the sales of the company’s products. In time, the French Hispano-Suiza became much more important than its parent company.
The H6, the first car developed and produced in France and until 1930 the only model built there, is considered to be one of Hispano-Suiza’s most successful cars. At the same time it was also built in Spain, though in small numbers intended mainly for the domestic market and fitted with a 3700 cc engine. Its technical details (the engine developed 135 bhp at 2,750 rpm), its performance (a maximum speed of around 95 mph) and the ease with which it could be driven made the H6 a much admired and sought after model. The engine was a derivative of one built of airplanes; it had a single camshaft, overhead valves, two spark plugs per cylinder, alloy pistons and pressure lubrication was used for the crankshaft, which had seven bearings. The exceptional rigidity of the crankshaft explains why only a 3-speed transmission was required. It had 4 servo-operated drum brakes.

Car : Hispano-Suiza Type 68 and 68 Bis
Year : 1931
Engine :V-12
Bore and stroke :100?100 mm
Cylinder capacity : 9420 cc
Gears : 3 forward
Brake horse power : 220
Maximum speed : 100 mph
Wheelbase :12 ft 5? ins (3.80 m)
Suspension : front and rear : semi-elliptic leaf- springs