Gulfstream GIII vs Gulfstream GIV-X (G450)
Live Market Snapshot
Current asking-price market, aggregated across multiple marketplaces · re-checked on a rolling daily cycle
Gulfstream GIII
- For sale now
- 3
- Model years available
- 1980–1982
Gulfstream GIV-X (G450)
No active listings right now.
Live data from AeroGurus, aggregated daily across the used-aircraft market. Figures are current asking prices, not appraisals — confirm with a pre-buy inspection.
Full Specs Comparison
Swipe to see all specs
| Spec / Model | Gulfstream GIII | Gulfstream GIV-X (G450) |
|---|---|---|
|
|
|
| Price Range | $185,000 – $365,000 | — |
| Category | Large Cabin Jet | Large Cabin Jet |
| Model Specifications | ||
| Seats | 14 | — |
| Cruise Speed | 480 kts (889 km/h) | — |
| Range | 3,600 nm (6,667 km) | — |
| Service Ceiling | 45,000 ft (13,716 m) | — |
| Useful Load | 13,000 lbs (5,897 kg) | — |
| Fuel Burn | 430.0 GPH (1628 L/h) | — |
| Engines | 2 x Turbofan | — |
Frequently Asked Questions
Which is better, Gulfstream GIII or Gulfstream GIV-X (G450)?
It depends on your mission and budget.
The GIII cruises at 480 kts with 3,600 nm range.
Review the specs table above to find which fits your flying profile.
How do prices compare?
Gulfstream GIII: from $175,000.
Prices vary by year, hours, avionics, and condition. Always get a pre-buy inspection.
What's the difference between Gulfstream GIII and Gulfstream GIV-X (G450)?
Which is cheaper to operate per hour?
Variable cost includes fuel, reserves and overhaul accruals. Annual fixed costs (hangar, insurance, annual inspection) add to the total.
Which has more seats and useful load?
GIII: 14 seats / 13,000 lb useful load.
Useful load = max gross weight minus empty weight; it determines how much fuel plus payload you can carry.
How does maintenance compare — TBO and overhaul cost?
Reaching the time-between-overhaul (TBO) triggers a mandatory engine/airframe rebuild that affects resale value.
Disclaimer: All prices and cost estimates are from third-party sources for informational purposes only. Always obtain professional appraisal and inspection before purchase.
Prices re-checked on a rolling cycle — most within a few days · Data: FAA Registry, NTSB · About our data