The Gulfstream IV is a new and upgraded version of the aircraft of the same name, numbered III. This model was made easier to manufacture. It features a light variable wing design and a long fuselage. Added a sixth porthole, a stabilizer. The aircraft received a larger span, a fuel supply, a cockpit with instrumentation. The basis was multifunctional indicators and modern Rolls-Royce Tau Mk611-8 engines. The thrust of each engine is 61.6 kN. The fuselage length is increased by 1.37 m.