Defence Minister Shri Manohar Parrikar has informed that the Defence Acquisition Council has in its meeting held on 17th December, 2015, accorded approval for purchase of S-400 LRSAM system (Triumf Missile System) along with associated equipment and missiles from Russia. A contract has been signed for supply of five Full Mission Simulators for SU-30 MKI aircraft with a Russian firm during 2015-16.
S-400 has better performance parameters compared to S-300 on account of (i) maximum and minimum target engagement range, (ii) minimum target engagement altitude, (iii) maximum speed of target engaged, (iv) number of targets engaged simultaneously, (v) maximum radar cross-section of targets engaged, and (vi) deployment time. 
The five firing units of S-400 LRSAM system are planned for induction in Indian Air Force in 13th plan period (2017-2022).