Gulfstream G450 for sale, the closest speed comparison / Range: 4,350 nm in the published industry comparison / Passengers: Typically around 8 in the referenced mission data.
The G450 is a natural comparison because its published maximum cruise speed is also around Mach 0.88, but its cabin volume is smaller at roughly 1,525 cu ft versus 2,022 cu ft listed for the Global 5000 in the same source.
If cabin size and 5,200 nm range matter, the Global 5000 has the stronger specification sheet. If the mission is shorter, the G450 remains a serious alternative.
Dassault Falcon 900LX for sale / Range: 4,750 nm at long-range cruise with six passengers and two crew / Speed: Maximum operating Mach is listed at 0.84/0.87 depending on the limit cited.
The Falcon 900LX uses three Honeywell TFE731-60 engines and has a cabin volume of 1,264 cu ft.
That is a very different aircraft philosophy. The Falcon has three engines and a smaller cabin, while the Global 5000 gives the buyer a wider cabin and higher published cruise speed.
Bombardier Challenger 605 for sale / Range: 4,000 nm in the published industry data / Speed: Mach 0.82.
The Challenger 605 has a cabin volume of about 1,150 cu ft, compared with roughly 2,022 cu ft for the Global 5000 in the same source.
This is the comparison to make when the buyer is deciding whether a large-cabin Global is necessary. The Challenger is smaller and sits in a different size class, while the Global 5000 gives substantially more cabin space and longer published range.
Embraer Legacy 650 for sale / Range: 3,900 nm with four passengers and NBAA IFR reserves / Passengers: Up to 14.
The Legacy 650 has a large cabin for its class, with about 1,656 cu ft of cabin volume, but its maximum operating speed is Mach 0.80.
For a buyer comparing cabin space and purchase economics, the Legacy deserves a look. Once speed and longer-range international missions become priorities, the Global 5000 moves ahead on the published numbers.
Dassault Falcon 2000LX for sale / Range: 4,000 nm in the referenced industry comparison / Speed: Mach 0.86.
The Falcon 2000LX has a cabin volume of about 1,024 cu ft and a maximum takeoff weight of 42,200 lb, far below the Global 5000's 92,500 lb published MTOW.
It is a useful alternative for an owner who does not need the size of the Global. The Global 5000 becomes more relevant when the requirement is a wide cabin, more payload and longer nonstop missions.