The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls. The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft. The family offers a choice of engines:
- International Aero Engines and CFM International for the A319, A320 and A321.
- Pratt & Whitney and CFM International for the A318.


AIRCRAFT DIMENSIONS
The picture shows the main dimensions for the A320.
The A318, A319 and A321 have exactly the same dimensions except that:
- the A318 is 6.12 m (20 ft) shorter,
- the A319 is 3.74 m (12ft 3in) shorter,
- the A321 is 6.93 m (22ft 9in) longer

With a Maximum Take-Off Weight (MTOW) of 77 tons (170000 lbs), the A320 has a range of 3600 Nm as shown above.
- For the A318, with an MTOW of 66 tons (145500 lbs), it is 3900 Nm.
- For the A319, with an MTOW of 68 tons (150000 lbs), it is 4200 Nm.
- For the A321, with an MTOW of 83 tons (183000 lbs), it is 3100 Nm.