Aircraft overview

The Gulfstream GIV / G300 / G350 / G400 / G450 family is a line of large cabin, long range business jets built by Gulfstream Aerospace. The original Gulfstream GIV first flew in 1985 and entered service in 1987, replacing the GIII with a new wing, a stretched cabin and Rolls Royce Tay turbofans. Production evolved through the GIV SP, then into the G300 and G400 designations, followed by the G350 and G450, which brought a redesigned nose section and the PlaneView cockpit. The series matters because it established the modern Gulfstream large cabin layout that remains a benchmark in the used intercontinental jet market.

Performance & specifications

Typical long range cruise is about Mach 0.80, with high speed cruise commonly around Mach 0.85. Range varies by model and loading: the GIV and G400 are generally quoted at about 4,200 nautical miles, the G300 and G350 at shorter long range profiles, and the G450 at about 4,350 nautical miles. Certified ceiling is 45,000 feet. Power is supplied by two Rolls Royce Tay turbofans, with the GIV using Tay 611 series engines and the G450 using Tay 611 8C engines with full authority digital engine control. Useful load and payload with full fuel vary materially by serial number, interior, equipment and service bulletin status, so individual weight and balance records are important.

Cabin & avionics

The cabin is a major reason buyers compare these models. Typical layouts seat 12 to 16 passengers, with multiple club, divan and conference arrangements, a forward or aft galley depending on configuration, and an enclosed aft lavatory. The GIV cabin cross section carried through the family, while later aircraft benefited from quieter interiors, improved systems and updated cabin management options. Avionics differ significantly by generation. Earlier GIV aircraft typically have Honeywell SPZ 8000 or related flight decks, often with later FMS, ADS B and display upgrades. The G350 and G450 introduced Gulfstream PlaneView avionics based on Honeywell Primus Epic architecture.

Buying & value

Used market positioning spans from value oriented GIV aircraft to later G450s that remain in demand for range, cabin size and avionics. Buyers should review engine program status, corrosion inspections, landing gear and flap system history, APU condition, avionics compliance, cabin refurbishment quality and major inspection timing. Common upgrade areas include FANS 1/A, CPDLC, ADS B Out, WAAS LPV capability, cabin connectivity and interior modernization. On PlaneFox listing data, asking prices average about EUR 8,690,000, with observed listings from EUR 2,850,000 to EUR 11,000,000, reflecting the wide spread between early GIV examples and upgraded late model G450 aircraft.