OSORIO MBT (project)

The EE-T1 Osorio MBT was a private development that Brazilian Engesa company carried out in the late 1980s, and that was Brazil’s first attempt to build a fully indigenous main battle tank. The name comes from a legendary Brazilian Army’s Marshall, a national hero called Manuel Luís Osório. The prototype was presented in August 1984 and although the Brazilian Army showed great interest in the project, finally they never decided to make a firm request. The Osorio MBT was built with composite armor and both the hull and the turret had a very sloping profile that improved protection. Two possibilities were offered for the main armament, the British 105mm L-7A3 rifled gun, destined for the Brazilian Army, and the powerful French Giat/EFAB CN-120 120mm smooth bore gun intended for the export market. Although Osorio MBT won a competition in Saudi Arabia to equip their armored forces, this country finally decided by the American M-1 Abrams, which led the Engesa company to bankruptcy in 1993, ending the dream of manufacturing a totally Brazilian MBT.

OSORIO MBT gallery and more info


Información adicional

Ficha Completa
Country of origin





Main Battle Tank


From 1985 to 1993



Combat weight

Osorio 105mm gun: 35,000 kg – Osorio 120mm gun: 39,000 kg

Dimensions (length x width x height)

9.99 x 3.26 x 2.37 meters

Armour, (maximum)

Composite: classified

Power plant

1 x Motoren Werke Manheim TBD.234.V12 diesel engine, 1,000 hp


70 km/h


550 km


1 x 105/51mm L.7A3 rifled gun or 1 x 120mm Giat/EFAB CN.120 smooth-bore gun
1 x 7.62mm coaxial MG + 1 x 12.7mm MG


52 x 105mm rounds or 40 x 120mm rounds + 600 x 12.7mm rounds + 3.000 x 7.62mm rounds


2 prototypes