[5][6] The new chassis had a more powerful Laffly 4-cylinder engine delivering 37 kilowatts (50 bhp) which gave an increased maximum speed of 60 kilometres per hour (37 mph) and increased range of 300 km (190 mi), the vehicle retained the original turret with the 37 mm main armament, whilst the machine gun was substituted for a 7.5 mm FM 24/29 still in the rear facing position.

[7] This chassis featured a more powerful again Laffly 4-cylinder engine delivering 60 kilowatts (80 bhp) which gave an further increased maximum speed of 80 kilometres per hour (50 mph) and range of 400 km (250 mi).

[8] In 1915 France imported bare White Motor Company trucks chassis from the United States for which the French firm Ségur & Lorfeuvre designed, manufactured and fitted armoured hulls locally, the designers were able to draw upon lesson learnt from the earlier Renault and Peugeot armoured cars, the White combining the two weapons from the two variants of the Peugeot into the one turret.

[3][5][6] It was soon determined that a further upgrade was required and so in 1933 the first Laffly-Vincennes AMD 80 was delivered, in total 28 examples were produced before the French Army switched procurement to the completely new Panhard 178.

[8][9] By 1918 the French Army considered the White AM to be their best and most useful armoured car design and they were used extensively on the Western Front.