From Wiki: :  The Arjun features a 120 mm main rifled gun with indigenously developed APFSDS ammunition which has capability of defeating superior armor, one 7.62 mm coaxial machine gun, and a 12.7 mm machine gun. It is powered by a single MTU multi-fuel diesel engine rated at 1,400 hp, and can achieve a maximum speed of 70 km/h (43 mph) and a cross-country speed of 40 km/h (25 mph). It has a 4-man crew: commander, gunner, loader and driver. Automatic fire detection and suppression, and NBC protection systems are provided. All-round anti-tank warhead protection by the newly developed Kanchan armour is claimed to be much higher than available in present third generation tanks