(Reuters) - Britain's Rolls-Royce said it won a $5 billion (3.19 billion pound) contract to supply aero engines to power 50 new Airbus planes ordered by Delta Air Lines.

Rolls-Royce said on Friday that the order for engines also included the provision of long-term post-delivery services as part of a "TotalCare" support package.

The engines ordered are the Trent XWB engines to power 25 Airbus A350s, and Trent 7000 engines to power 25 Airbus A330neo aircraft. Rolls-Royce is the only supplier of engines for both aircraft.

Delta's order was first reported on Wednesday and follows a closely fought competition with Boeing, which had offered its 787 Dreamliner.