The Carro Armato M 14/41 was essentially the M13/40 fitted with a more powerful diesel engine that was equipped with air filters designed to cope with the harsh conditions of the desert.
The main combat version, the L.6/40 soon proved to be of little value against the British armor then in use in North Africa and was obviously ripe for the usual limited traverse anti-tank gun treatment. It was not long in coming when Fiat-SPA and Ansaldo combined to use the chassis for the basis of a tank destroyer.
Initially, the Semovente da 75/18 was internally identical to the M13/40, the major difference being the 75 mm Ansaldo L/18 field gun fixed in the superstructure, and the obvious upper hull changes. By 1942, Italy was producing armored vehicles that were better suited for desert conditions than their previous models