After conducting extensive trials in Ladakh, the Indian Army placed orders for these vehicles under an emergency procurement amidst China-India Border Standoff in a contract worth ₹177.95 crore (equivalent to ₹200 crore or US$23 million in 2023) in 2021.[7]
Design
The Kalyani M4 is designed predominantly as an extraction and occupant protection vehicle. Its design offers high speed and quick manoeuvrability. It has a maximum payload of 2.3 tonnes and can carry up to 8 people. With all the armour, the M4 weighs around 16,000 Kg. It has a 43-degree approach and 44-degrees departure angle with a water wading depth of 900 mm to operate it in tough terrain or fording rivers [8]
The Kalyani M4 uses a turbocharged 6-pot diesel motor which is rated to deliver 465hp and a 1627 Nm of torque. It uses a CVT automatic transmission. It also features a low-range gearbox to work with the 4×4 system to scale difficult steep inclines. The M4 has top speed of 140 km/h and has a range of 800 km.[9][10]
It can withstand three 10 kg TNT charges under the wheels and 50 kg IED side blasts.[11][12]