The IAE V2500 is a two-shaft high-bypass turbofan engine which powers the Airbus A320 family, the McDonnell Douglas MD-90, and the Embraer KC-390

The engine's name is a combination of the Roman numeral V, symbolizing the five original members of the International Aero Engines consortium, which was formed in 1983 to produce the V2500 engine. The 2500 represents the 25,000 lbf (111 kN) produced by the original engine model, the V2500-A1 variant. FAA type certification for the V2500 was granted in 1988.

Rolls-Royce based the 10-stage HP compressor on a scale-up of the RC34B eight-stage research unit used in the RB401-06 Demonstrator Engine, but with two additional stages added to the front and rear of the compressor spool. Pratt & Whitney developed the combustor and the 2-stage air-cooled HP turbine, while the Japanese Aero Engine Corporation provided the LP compression system. MTU Aero Engines were responsible for the 5-stage LP turbine and Fiat Avio designed the gearbox. In 1989, its unit cost was U$4.7 million, $9.9M today.

A fourth booster stage was introduced into the engine basic configuration to increase core flow. This, together with a minor fan diameter and airflow increase, helped to increase the maximum thrust to 33,000 lbf (147 kN) thrust, to meet the requirements of the larger Airbus A321. Soon, Airbus offered derated versions of the V2500-A5 on the Airbus A319 and Airbus A320, enabling the same engine hardware to be used across all Airbus A320 family aircraft, with the exception of the Airbus A318. The vast majority of V2500s are of the A5 variety.


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