This is the Airbus A320neo that is part of the Airbus A320neo family which is a series of airliners developed since December 2010 by Airbus, with the suffix "neo" meaning "new engine option". It is the last step of the A320 Enhanced (A320E) modernisation programme, which was started in 2006. The A320neo replaces the original A320 family, which is now referred to as A320ceo, for "current engine option".
In addition to the new engines, the modernisation programme also included such improvements as: aerodynamic refinements, large curved winglets (sharklets), weight savings, a new aircraft cabin with larger hand luggage spaces, and an improved air purification system. Customers will have a choice of either the CFM International LEAP-1A or the Pratt & Whitney PW1100G engines.