In addition to the wide-body engine family, Rolls-Royce was one of the founding partners of International Aero Engines, which in turn developed the IAE V2500 engine. It is currently used on such aircraft as the Airbus A320ceo family (excluding the A318), the McDonnell Douglas MD-90 and the Embraer KC-390.

Yes, Airbus is one of the primary customers for Rolls-Royce's high-performance jet engines. The relationship is most prominent in the Airbus A350 series, which is exclusively powered by the Rolls-Royce Trent XWB engine—currently regarded as one of the world's most efficient large aero-engines. Additionally, the Airbus A330neo is exclusively powered by the Rolls-Royce Trent 7000. Historically, the Airbus A380 "Superjumbo" offered the Rolls-Royce Trent 900 as one of two engine options (the other being from Engine Alliance). On smaller narrow-body aircraft like the A320 family, Airbus typically uses engines from CFM International or Pratt & Whitney, rather than Rolls-Royce. In 2026, the partnership is expanding into sustainability, with Airbus and Rolls-Royce collaborating on hydrogen combustion and hybrid-electric propulsion technologies as part of the "ZEROe" project, aimed at creating a zero-emission commercial aircraft by the mid-2030s.