Of all the modern narrowbody airliners, theAirbus A320neo series stands out as the only family with multiple engine options, as the Airbus A220 (formerly the Bombardier CSeries), the COMAC C919, and the Embraer E-Jet E2 all have single-engine options. Most notably, Boeing’s 737 MAX series is also exclusively powered and is the best direct comparison with the Airbus A320neo.