Singapore, Feb. 4 -- Tigerair Taiwan has signed a purchase agreement with Airbus for four A321neo aircraft, marking the airline's first order for this type. The new aircraft will support the airline's network expansion while delivering improved fuel efficiency and reduced emissions compared to previous generation aircraft.The low-cost carrier which currently operates a fleet of 17 A320 Family aircraft, including nine A320ceo and eight A320neo, will benefit from greater commonality across the A320 Family, reducing training, maintenance and operating costs. The A321neo, the largest member of Airbus' best-selling A320neo Family, offers segment-leading operating economics and extended range, enabling airlines to serve regional and medium-haul r...