Airbus ACJ319 for sale:
Range: ACJ319 aircraft have published missions beyond the ACJ318, while the newer ACJ319neo reaches 6,750 nm with eight passengers under Airbus' published assumptions.
Passengers: up to 19 in corporate configurations.
The ACJ319 is the closest comparison because it keeps the same basic Airbus cabin concept while giving the buyer more fuselage length and range. If the ACJ318 is close to the edge of the required mission, this is the first alternative I would examine.
Boeing BBJ 737-7 for sale:
Range: up to 6,600 nm in Boeing's published BBJ specification.
Passengers: configuration dependent.
The BBJ 737-7 is the natural Boeing alternative. It has substantially more range than the ACJ318 and remains an airliner-derived corporate aircraft. For a buyer who needs longer intercontinental missions, the BBJ has a clear advantage.
The ACJ318 can still make sense when the required mission is shorter and the buyer is looking for a used Airbus platform with a large existing VIP completion.
Embraer Lineage 1000E for sale:
Range: around 4,600 nm in published specifications.
Passengers: up to 19.
The Lineage is a particularly relevant comparison because it also turns a commercial aircraft platform into a private aircraft.
The cabins are large in both cases. The ACJ318's main advantage is the width and volume of the A320-family fuselage.
Gulfstream G450 for sale:
Range: around 4,350 nm with eight passengers under published NBAA assumptions.
Passengers: up to 16, depending on configuration.
The G450 is much closer to a conventional business jet. Its cabin is smaller, but the aircraft is easier to fit into a normal business-aviation operating model.
The comparison comes down to mission size. If you need a large group cabin, the ACJ318 has the space. If you normally carry fewer people, the Gulfstream becomes more attractive.
Dassault Falcon 900LX for sale:
Range: 4,750 nm with six passengers under Dassault's published NBAA IFR assumptions.
Passengers: configuration dependent.
The Falcon 900LX is a different tool. Three engines, a smaller cabin and a traditional business-jet layout make it attractive for a buyer who does not need the ACJ318's interior volume.
The ACJ318 wins on cabin space. The Falcon is the more conventional business-jet choice.
Bombardier Global 5000 for sale:
Range: 5,200 nm in Bombardier's published mission profile.
Passengers: up to 16.
The Global 5000 has more range and a faster business-jet operating profile, but the cabin is much narrower than the Airbus.
That is the important comparison. The Global is strong when long-range executive travel is the priority. The ACJ318 becomes more compelling when the cabin itself is part of the mission.