History Work on the Gulfstream GIV began in 1983. The Gulfstream GIV made its first flight in 1985 and entered service in 1987. The biggest differences from the GIII are FAR 36 Stage 3 compliant Rolls-Royce Tay 611-8 engines, a 4-foot-longer cabin, and 340 nautical miles extra range. Summary NAME: G IV MANUFACTURER: Gulfstream Type: Jets RANGE: 3800 nm SPEED: 500 kts PASSENGERS: 13 people ACQUISITION COST: $3,109,742 ENGINES: Rolls Royce TAY 611-8 2 AVIONICS: APU: Standard WINGSPAN: 77.8 ft IFR CERTIFIED: Yes