After long delays, the deal for the purchase of S-400 Surface to Air Missile Defence System enters the final phase. India has been doing long negotiations with Russia in terms of price as Russia was hiking the price for the system. The negotiations between the Indian government and Russian government is in the final stage and maybe finalized very soon.
For the last 40 years, India has been lacking in upgrading its air defense fleet. The defense system that protects the urban city like Delhi is old and has not been upgraded and is based on 1970’s Russian technology.
The present air defense system of India includes S-125 Pechora, OSA-AK, Akash, Barak 1 and 8.