what is the difference between a319 and a320
Airbus A320 family The A319 is the next derivative of the baseline A320. The design is a "shrink" with its origins in the 130- to 140-seat SA1, part of the Single-Aisle studies.[51] The SA1 was shelved as the consortium concentrated on its bigger siblings. After healthy sales of the A320/A321, Airbus re-focused on what was then known as the A320M-7, meaning A320 minus seven fuselage frames.[53] It would provide direct competition for the 737–300/-700.[51] The shrink was achieved through the removal of four fuselage frames fore and three aft of the wing, cutting the overall length by 3.73 metres (12 ft 3 in).[47][54][55] Consequently, the number of overwing exits was reduced from four to two. The bulk-cargo door was replaced by an aft container door, which can take in reduced height LD3-45 containers.[54] Minor software changes were made to accommodate the different handling characteristics; otherwise the aircraft is largely unchanged. Power is provided by the CFM56-5A or V2500-A5, derated to 98 kN (22,000 lbf), with option for 105 kN (24,000 lbf) thrust.[56]