Why Did Airbus Build The A340 With 4 Engines?

The Airbus A340 is one of the most iconic jets ever produced by Airbus, and it is a long-range wide-body quad-engine passenger airliner that was originally developed alongside the twin-engine Airbus A330 in the 1980s. First launched commercially in June 1987, the Airbus A340-300, the first model to take to the skies, performed its first test flight on October 25th, 1991. The first two variants to enter service, the A340-200 and the A340-300, both made their first passenger flights in 1993 with Lufthansa and Air France. The aircraft was later upgraded with two larger, longer-range variants, the Airbus A340-500 and the Airbus A340-600, which entered service in 1997 and 2002, respectively.