The Advanced Medium Combat Aircraft is India's planned fifth-generation stealth fighter, designed by the Aeronautical Development Agency (ADA). Fifth-generation aircraft are characterised by low observability (stealth), sensor fusion, advanced avionics and internal weapons carriage — the last of these being why the engine matters so much, since a jet that hides its weapons inside the fuselage needs a compact, high-thrust powerplant. The Detailed Design Phase, funded at ₹447 crore, ran from 2018 and was completed in 2023. The Cabinet Committee on Security cleared the Full Scale Engineering Development phase in March 2024 with ₹15,000 crore. In May 2025 the Ministry of Defence approved the programme's execution model, which opens participation to both public and private sector firms on a competitive basis — bidding independently, as a joint venture, or as a consortium. The first prototype is anticipated around 2028-29, with series production projected for the early 2030s.

India has designed and flown indigenous combat aircraft but has never fielded an indigenous combat engine. The Kaveri engine, developed by GTRE, could not meet the thrust requirement for the Tejas, which flies on the imported GE F404; a derivative of Kaveri has since been redirected to unmanned platforms. High-thrust turbofan technology — single-crystal turbine blades, thermal barrier coatings, hot-section metallurgy — is held by a very small number of firms worldwide and is rarely transferred. That is why the AMCA engine has become a negotiation about technology transfer and intellectual property rather than about price, and why two rival routes are live at once: the Reliance-Rolls-Royce private partnership announced here, and Safran's proposal alongside GTRE. Neither has been converted into a government contract yet.