[2] Truck and military vehicle engines and differentials sourced from ARAR centres (Azienda Rilievo Alienazione Residuati) were used to build the first "Carioca" tractors.

These machines featured a significant innovative technical solution – a fuel atomiser which, when used in conjunction with a Morris engine, allowed the tractor to be started with petrol and then switch to diesel.

The enactment of the Fanfani law of 25 July 1952 (that set aside 125 billion lire – with an interest rate of 3% – over 5 years for farmers who purchased Italian-made agricultural machinery) helped the company make a further quality leap.

A new plant was opened in 1956; in 1957, in the wake of the SAME Sametto, the company introduced the Lamborghinetta (weighing 1000 kg, with a 22 HP two-cylinder engine, and sold at a price of around one million lire).

Thanks to a notable increase in sales, in 1968–69 Lamborghini Trattori adopted a strategy aimed at improving both the technical quality of its tractors and the production volumes.