The 757 was the first Boeing airliner launched with engines produced outside the United States, with early customers selecting the Rolls-Royce RB211-535C.[7] Pratt & Whitney soon offered the PW2000, launched by Delta Air Lines.[7] General Electric offered an engine option early in the program, the CF6-32, but eventually abandoned the engine due to insufficient demand.[4] The RB211-535E4 soon replaced the 535C as the default Rolls Royce engine on the 757. With the -100 variant attracting little interest, the primary 757 design offered to customers consisted of the -200 model, with the choice of engine manufacturer, and either regular or longer-range fuel capacity.[4]