Heavy Jet (Legacy)
Gulfstream G-IVSP (GIV-SP): Complete Specs, Performance, and Buyer's Guide (2026)
Gulfstream Aerospace
Gulfstream G-IVSP (GIV-SP): Complete Specs, Performance, and Buyer's Guide (2026)
The Gulfstream G-IVSP (also written GIV-SP, in production from 1993 to 2002) is the second iteration of the esteemed G-IV series and the direct improved successor to the Gulfstream G-IV. The G-IVSP introduced substantial engineering refinements while maintaining the same Rolls-Royce Tay 611-8 engines and core airframe of the G-IV. Per Globalair: "Introduced in 1987, the Gulfstream IV was upgraded to the Gulfstream IV/SP in 1993. Post-serial number 1500, the GIV-SP models were further modified and rebranded as the G400." The G-IVSP starts at serial number 1214 (1993). The G-IVSP's notable improvements over its predecessor G-IV include increased takeoff and landing weight capacity (maximum takeoff weight 74,600 lb - 1,400 lb more than G-IV's 73,200 lb), increased landing weight (+7,500 lb providing greater operational flexibility for longer round trips without costly fuel stops), enhanced dispatch reliability through replacement of the G-IV's brake-by-wire system with a hydro-mechanical one, and redesigned wheels and tires improving taxiing and runway performance. Powered by two Rolls-Royce Tay Mk 611-8 turbofan engines (each producing 13,850 lbf of thrust, same engines as G-IV), the Gulfstream G-IVSP delivers Mach 0.85 max speed, 480 KTAS high-speed cruise, 4,109 nm range NBAA IFR with 4 passengers at high speed (~480 KTAs). 45,000 ft service ceiling. Three distinct living areas in the cabin including 4-place club arrangement (forward section), 2-place club and divan (mid-cabin), and 4-place conference seating (aft section). Most common configuration seats 14 passengers (12-16 configurable, up to 19 maximum). Full-service galley typically located aft section (or forward). 169 cubic feet of baggage compartment (accessible during flight, up to 24 bags assuming each <5 cubic feet). The G-IVSP set new world speed and distance records on a routine business flight from Tokyo to Albuquerque in March 1993. Production continued through 2002 with the G-IVSP eventually being renamed the G400 (with serial number 1500). NOAA operates a modified G-IVSP (N49RF) at 45,000 ft around tropical cyclones - the aircraft was modified to drop "dropsondes" to measure windspeed, barometric pressure, humidity, and temperature, with a side-scanning Doppler weather radar added to the rear fuselage in 2009 for storm cloud profiling. Pre-owned per Wikipedia 2018: $1.25M-$5.2M for 1992-1999 models. Per Wikipedia, 15-year-old G300s and G400s available for $4.5M-$7M.
For operators wanting Gulfstream's mid-cycle improved G-IV variant with substantially increased takeoff and landing weight capacities (+1,400 lb MTOW, +7,500 lb landing weight), enhanced dispatch reliability through hydro-mechanical brake system replacement of brake-by-wire, the same proven Tay 611-8 engines as G-IV, redesigned wheels and tires for improved taxiing and runway performance, 4,109 nm range NBAA IFR, 45,000 ft service ceiling, three distinct living areas, premium Gulfstream heritage, and accessible $1.25M-$5.2M pre-owned market, the Gulfstream G-IVSP represents Gulfstream's modernized mid-cycle large-cabin heavy-iron platform.
Gulfstream G-IVSP Specifications at a Glance
| Specification | Value |
|---|---|
| Category | Heavy Jet (Legacy) |
| Production Status | Discontinued 2002 (renamed G400 at serial 1500) |
| Designation | Gulfstream G-IVSP (GIV-SP) |
| Manufacturer | Gulfstream Aerospace (General Dynamics) |
| Predecessor | Gulfstream G-IV (1987-1992) |
| Production Years | 1993 to 2002 |
| Entered Service Serial Number | 1214 |
| Successor Designation | Gulfstream G400 (serial 1500+) |
| Industry Distinction | Improved G-IV with substantially increased MTOW + MLW |
| Industry Distinction | Hydro-mechanical brake system (replaces G-IV's brake-by-wire) |
| Industry Distinction | Redesigned wheels and tires |
| Industry Distinction | Tokyo-Albuquerque speed/distance records 1993 |
| Industry Distinction | NOAA tropical cyclone observation aircraft (N49RF) |
| Crew | 2 (sometimes more) |
| Passengers (Most Common) | 14 |
| Passengers (Configurable) | 12 to 16 |
| Passengers (Maximum) | Up to 19 |
| Engines | 2× Rolls-Royce Tay Mk 611-8 turbofans (same as G-IV) |
| Thrust per Engine | 13,850 lbf |
| Stage 3 Noise Compliance | Yes (inherited from G-IV) |
| Avionics | Honeywell SPZ-8400 (upgrade option from G-IV's SPZ-8000) |
| Brake System | Hydro-mechanical (replaces G-IV's brake-by-wire) |
| Connectivity | Modern retrofits available |
| Max Speed | Mach 0.85 |
| Cruise Speed (High-Speed Long-Range) | 480 KTAs |
| Long-Range Cruise | Mach 0.80 |
| Max Range (Long-Range Cruise per Globalair) | 4,109 nm with IFR reserves + 4 passengers |
| Service Ceiling | 45,000 ft |
| Cabin Length | ~45.8 ft (same as G-IV) |
| Cabin Width | 7.3 ft |
| Cabin Height | 6.2 ft |
| Cabin Volume | 1,658 cu ft |
| Baggage Compartment | 169 cu ft (24 bags) |
| Baggage Accessible in Flight | Yes |
| Maximum Takeoff Weight | 74,600 lb (+1,400 lb vs G-IV) |
| Maximum Landing Weight | +7,500 lb vs G-IV |
| Living Zones | 3 (forward club + mid-cabin club + aft conference) |
| Full-Service Galley Location | Aft (sometimes forward) |
| Pre-Owned (per Wikipedia 1992-1999) | $1,250,000 to $5,200,000 (2018 pricing) |
History as the Improved G-IV Variant
The G-IVSP represents Gulfstream's strategic decision to refine the G-IV with substantial weight, brake, and operational improvements.
Platform timeline:
- 1987: G-IV enters service (serial 1000)
- 1992: G-IV production ends
- 1993: G-IVSP enters service (serial 1214)
- March 1993: G-IVSP sets Tokyo to Albuquerque speed/distance records
- 2002: G-IVSP production ends
- 2002: GIV-SP rebranded as G400 (serial 1500)
- 2004: G450 (GIV-X) FAA approved August 12, 2004
- 2018: Last G450 delivered January 19, 2018
Per Wikipedia: "By the end of the G450 production run, 365 aircraft were produced." Per Globalair G-IVSP: "Introduced in 1987, the Gulfstream IV was upgraded to the Gulfstream IV/SP in 1993. Post-serial number 1500, the GIV-SP models were further modified and rebranded as the G400."
Why the G-IVSP Is Improved G-IV Mid-Cycle Variant
The G-IVSP introduced focused improvements over the G-IV:
1. Substantially Increased Takeoff Weight (74,600 lb)
The defining G-IVSP advantage:
- +1,400 lb vs G-IV's 73,200 lb MTOW: Premium positioning
- More passengers/luggage/office equipment: Modern positioning
- Substantial operational flexibility: Industry-leading
- Industry-distinct: Premium
2. Substantially Increased Landing Weight
- +7,500 lb landing weight: Industry-leading
- Premium operational flexibility: Modern positioning
- More fuel for round trips: Premium positioning
- Avoids costly fuel stops: Industry-leading
3. Hydro-Mechanical Brake System
- Replaces G-IV's brake-by-wire: Modern positioning
- Enhanced dispatch reliability: Industry-leading
- Premium operational reliability: Modern positioning
- Industry-leading: Premium
4. Redesigned Wheels and Tires
- Improved taxiing performance: Premium positioning
- Improved runway performance: Industry-leading
- Modern positioning: Premium
- Industry-distinct: Premium positioning
5. Same Tay 611-8 Engines
- Established proven: Modern
- 13,850 lbf per engine: Premium thrust class
- Same as G-IV: Industry-leading
- Stage 3 noise compliant: Industry-leading
6. Same Cabin + Industry-Leading Living Zones
- 1,658 cu ft cabin volume: Industry-leading
- Three distinct living zones: Premium positioning
- Forward 4-place club: Premium social
- Mid-cabin 2-place club + divan: Premium private
- Aft 4-place conference: Premium business
7. 169 cu ft Baggage Compartment
- Up to 24 bags: Industry-leading
- Accessible in flight: Premium positioning
- Modern operational flexibility: Industry-leading
8. Same Industry-Leading 45,000 ft Service Ceiling
- Premium positioning: Modern
- Above weather + traffic: Industry-leading
- Modern operational envelope: Premium positioning
Cabin Interior
The G-IVSP cabin features same industry-leading dimensions as G-IV:
| Cabin Measurement | Value |
|---|---|
| Cabin Length | ~45.8 ft (same as G-IV) |
| Cabin Width | 7.3 ft (same as G-IV) |
| Cabin Height | 6.2 ft (stand-up) |
| Cabin Volume | 1,658 cu ft |
| Baggage Compartment | 169 cu ft (24 bags) |
| Baggage Accessible in Flight | Yes |
Standard Configuration
- 14 Passengers Most Common: Premium positioning
- 12 to 16 Passengers Configurable: Standard
- Up to 19 Passengers Maximum: Premium maximum
- Forward 4-Place Club Arrangement: Premium social
- Mid-Cabin 2-Place Club + Divan: Premium private
- Aft 4-Place Conference Seating: Premium business
- Full-Service Galley (Aft - sometimes Forward): Premium dining
- Three Distinct Living Areas: Premium customization
Cabin Features
- 1,658 cu ft cabin volume: Industry-leading
- Three distinct living areas (industry-leading customization): Premium positioning
- Forward 4-place club + mid 2-place club + divan + aft 4-place conference: Modern
- Full-service galley: Premium dining
- 169 cu ft baggage (24 bags accessible in flight): Industry-leading
- 6.2 ft stand-up cabin: Premium
- Premium fit + finish: Industry-leading
- Modern customization potential: Premium positioning
Performance
Speed and Range
| Performance Metric | Value |
|---|---|
| Max Speed | Mach 0.85 |
| Cruise Speed (High-Speed Long-Range) | 480 KTAs |
| Long-Range Cruise | Mach 0.80 |
| Max Range (IFR Reserves + 4 pax per Globalair) | 4,109 nm |
| Service Ceiling | 45,000 ft |
Runway Performance
| Field Performance | Value |
|---|---|
| MTOW | 74,600 lb (+1,400 lb vs G-IV) |
| Max Landing Weight | +7,500 lb vs G-IV |
| Improved Hydro-Mechanical Brakes | Industry-leading |
| Redesigned Wheels + Tires | Premium positioning |
Typical Mission Examples
- New York to London - non-stop comfortable
- Tokyo to Albuquerque (March 1993 speed/distance record)
- Coast-to-coast U.S.: Premium positioning
- Transatlantic + transcontinental: Premium positioning
- NOAA tropical cyclone observation: Industry-leading
Engines
Two Rolls-Royce Tay Mk 611-8 turbofan engines (same as G-IV), each producing 13,850 lbf of thrust.
Key features:
- Same Tay 611-8 engines as G-IV: Established proven
- 13,850 lbf per engine: Premium thrust class
- 27,700 lbf total thrust: Industry-leading
- Stage 3 noise compliant: Industry-leading
- 22-blade titanium fan: Modern engineering
- Premium fuel efficiency vs G-III Spey: Modern positioning
Avionics: Honeywell SPZ-8000 / SPZ-8400
Industry-leading integrated avionics (inherits G-IV's all-glass cockpit):
- Honeywell SPZ-8000 standard / SPZ-8400 upgrade option: Modern integration
- Six color CRT EFIS displays: Industry-leading
- Collins radios FMS: Standard
- Dual Honeywell laser inertial reference systems: Premium positioning
- First all-glass cockpit business jet heritage: Industry-leading
- TCAS, EGPWS: Standard
- Modern weather radar: Standard
- Premium pilot interface: Industry-leading
Operating Costs
| Cost Item | Per Hour |
|---|---|
| Fuel (479-520 GPH) | $3,000 to $3,300 |
| Engine Reserve (Tay 611-8) | $750 |
| Airframe Maintenance | $1,300 |
| Insurance + Hangar | $750 |
| Crew | $1,000 |
| Other Variable | $400 |
| Total Direct Operating Cost (Estimated) | ~$7,500/hr |
Annual operating budget estimate: $2-2.5M.
Pricing
| Year/Status | Price |
|---|---|
| Pre-Owned (1992-1999 per Wikipedia 2018) | $1,250,000 to $5,200,000 |
| Pre-Owned 15-Year-Old G300/G400 (per Wikipedia) | $4,500,000 to $7,000,000 |
| Hourly Charter Rate | $5,500+ |
Mission Profile
Best fit profiles:
- Step-Up From G-IV: Substantially increased MTOW/MLW + hydro-mechanical brakes
- Step-Up From Light/Mid Jets: Industry-leading cabin
- Transatlantic Operators: Premium positioning
- Premium Gulfstream Heritage Operators: Industry-leading
- Multi-Generational Operators: Premium positioning
- Accessible-Entry Modern Heavy Jet Operators: $1.25-5.2M
- NOAA / Government Operators: Premium positioning
- US Military / Government Operators: C-20 variants
Less suited if:
- You need maximum range (consider G-V at 6,500 nm)
- You require modern Pro Line 21 avionics (consider G450)
- You need lowest acquisition cost (consider G-III or G-IV early models)
- You require Stage 4 noise compliance (consider G-V or modern)
Pros and Cons
What the G-IVSP Does Well
- 4,109 nm range NBAA IFR with 4 passengers
- Mach 0.85 max speed
- 480 KTAS high-speed cruise
- Mach 0.80 long-range cruise
- 45,000 ft service ceiling
- Two Rolls-Royce Tay Mk 611-8 engines (13,850 lbf each)
- 27,700 lbf total thrust
- Stage 3 noise compliant
- Maximum takeoff weight 74,600 lb (+1,400 lb vs G-IV)
- Maximum landing weight +7,500 lb vs G-IV
- Hydro-mechanical brake system (replaces G-IV brake-by-wire)
- Enhanced dispatch reliability
- Redesigned wheels and tires
- Improved taxiing and runway performance
- Honeywell SPZ-8000 / SPZ-8400 avionics
- Six color CRT EFIS displays
- All-glass cockpit heritage (inherited from G-IV)
- 1,658 cu ft cabin volume
- 6.2 ft stand-up cabin
- 7.3 ft cabin width
- Three distinct living areas
- Forward 4-place club arrangement
- Mid-cabin 2-place club + divan
- Aft 4-place conference seating
- Full-service galley (aft or forward)
- 169 cu ft baggage compartment (24 bags)
- Baggage accessible in flight
- 14 passengers most common (up to 19 maximum)
- March 1993 Tokyo-Albuquerque speed/distance records
- NOAA tropical cyclone observation aircraft
- $1.25M-$5.2M pre-owned (1992-1999 per Wikipedia)
- Premium Gulfstream heritage
- US military variants
- Strong residual value
- Modern retrofits available
- Gulfstream worldwide service network
Tradeoffs to Understand
- Production ended 2002 (renamed G400 from serial 1500)
- Range less than G-V (4,109 vs 6,500 nm)
- Original SPZ-8000 avionics less modern than Pro Line 21
- Smaller cabin than G450/G550
- Some 1993-2002 variants have older systems requiring retrofits
Frequently Asked Questions
How is the G-IVSP different from the G-IV?
The G-IVSP (1993-2002) is the improved successor to the G-IV (1987-1992). Per Globalair: "A notable improvement in the Gulfstream IV/SP over its predecessor is its increased takeoff and landing weight capacity. The maximum take-off weight is 74,600 pounds, 1,400 pounds more than the G-IV, allowing for more passengers, luggage, or office equipment. The landing weight increased by 7,500 pounds, providing greater operational flexibility and enabling crews to carry more fuel for round trips, thus avoiding costly fuel stops. The Gulfstream IV/SP also features enhanced dispatch reliability due to the replacement of the G-IV's break-by-wire system with a hydro-mechanical one. Additionally, redesigned wheels and tires improve taxiing and runway performance, contributing to the increased weight allowances." Same Tay 611-8 engines, same airframe, same cabin.
How is the G-IVSP different from the G400?
The G400 is the rebranded designation for the GIV-SP starting at serial number 1500 (post-2002 modifications). Per Globalair: "Post-serial number 1500, the GIV-SP models were further modified and rebranded as the G400." Same airframe and engines but with additional modifications. The G400 has a large cabin, long range of 4,350 nm (8,060 km), and the same comfort and design characterizing the G series. Maximum cruise height and speed: 45,000 ft and Mach 0.85.
How is the G-IVSP different from the G450?
The G450 (formerly designated GIV-X, approved by FAA August 12, 2004) is the modernized successor to the G-IVSP family. Per Wikipedia: "Compared to the Gulfstream IV, its fuselage is 12 in (300 mm) longer and the main entry door relocated aft. The Rolls-Royce Tay 611 engines are replaced by 611-8Cs with FADEC, redesigned thrust reversers, nacelles and pylons which increases range and payload, coupled with aerodynamic improvements. Many Gulfstream V-SP improvements are used: the Honeywell advanced flight deck display suite, electrical power generation, cabin temperature control and pressurization, nose and nose landing gear."
What engines power the G-IVSP?
Two Rolls-Royce Tay Mk 611-8 turbofan engines (same as G-IV), each producing 13,850 lbf of thrust. Stage 3 noise compliant. The G-IVSP uses the same engines as the G-IV (the brake system change is the primary mechanical improvement).
How far can a G-IVSP fly?
The G-IVSP can fly up to 4,109 nm with IFR reserves and 4 passengers at high speed (~480 KTAs) per Globalair. The +7,500 lb maximum landing weight increase enables greater operational flexibility - crews can carry more fuel for round trips, thus avoiding costly fuel stops.
What records did the G-IVSP set?
A G-IVSP set new world speed and distance records on a routine business flight from Tokyo to Albuquerque in March 1993 per BusinessAirNews. The G-IVSP also continued the G-IV family's record of 68+ world records in its class.
What NOAA mission does the G-IVSP serve?
The National Oceanic and Atmospheric Administration (NOAA) operates a G-IVSP (N49RF) modified to fly scientists and crew members at 45,000 ft around tropical cyclones. The aircraft was modified to drop instruments called "dropsondes" to measure windspeed, barometric pressure, humidity, and temperature as they fall to the surface of the ocean. By sampling the cyclone with these dropsondes over a 4,000 mi track around the storm, forecasters at NOAA's National Hurricane Center and Hurricane Research Division can better predict where the hurricane will be "steered" by the upper-level winds. In 2009, NOAA's GIV-SP was further modified by addition of a side-scanning Doppler weather radar to the rear fuselage for storm cloud profiling. Per Wikipedia: "The GIV-SP is suited for this mission since it is fast, and can fly long distances with ample cabin space for the crew and instruments."
What's the G-IVSP pre-owned market like?
Per Wikipedia 2018 reference: 1992-1999 GIV-SPs were listed for $1.25M-$5.2M. Per Wikipedia: 15-year-old G300s and G400s were available for $4.5M-$7M. Modern modifications (Pro Line 21 retrofit, ADS-B, etc.) substantially affect value.
The Bottom Line
The Gulfstream G-IVSP (in production from 1993 to 2002, starting at serial number 1214) represents Gulfstream Aerospace's strategic improved successor to the Gulfstream G-IV - introducing substantial engineering refinements while maintaining the same Rolls-Royce Tay 611-8 engines and core airframe of the G-IV. With substantial industry-leading capabilities (substantially increased takeoff weight capacity of 74,600 lb - 1,400 lb more than G-IV's 73,200 lb allowing for more passengers + luggage + office equipment, substantially increased landing weight by 7,500 lb providing greater operational flexibility and enabling crews to carry more fuel for round trips thus avoiding costly fuel stops, hydro-mechanical brake system replacing G-IV's brake-by-wire for enhanced dispatch reliability, redesigned wheels and tires improving taxiing and runway performance, same proven Rolls-Royce Tay Mk 611-8 turbofan engines providing 13,850 lbf of thrust each with Stage 3 noise compliance, Mach 0.85 max speed with 480 KTAS high-speed long-range cruise and Mach 0.80 long-range cruise, 4,109 nm range NBAA IFR with 4 passengers, 45,000 ft service ceiling, substantial cabin of 1,658 cu ft volume with three distinct living areas including forward 4-place club arrangement + mid-cabin 2-place club and divan + aft 4-place conference seating + full-service galley + 169 cu ft baggage compartment accessible during flight up to 24 bags), the Gulfstream G-IVSP delivered Gulfstream's strategic improved mid-cycle heavy-iron platform. Per Globalair: "Introduced in 1987, the Gulfstream IV was upgraded to the Gulfstream IV/SP in 1993. Post-serial number 1500, the GIV-SP models were further modified and rebranded as the G400." A G-IVSP set new world speed and distance records on a routine business flight from Tokyo to Albuquerque in March 1993. Standard configuration accommodates 14 passengers most common (12-16 configurable, up to 19 maximum) in three distinct living areas. NOAA operates a modified G-IVSP (N49RF) at 45,000 ft around tropical cyclones - the aircraft was modified to drop dropsondes to measure windspeed + barometric pressure + humidity + temperature, with a side-scanning Doppler weather radar added to the rear fuselage in 2009 for storm cloud profiling. By sampling the cyclone with these dropsondes over a 4,000 mi track around the storm, forecasters at NOAA's National Hurricane Center and Hurricane Research Division can better predict where the hurricane will be "steered" by the upper-level winds. Per Wikipedia: "The GIV-SP is suited for this mission since it is fast, and can fly long distances with ample cabin space for the crew and instruments." Pre-owned market per Wikipedia 2018: 1992-1999 GIV-SPs at $1.25M-$5.2M. Pre-owned 15-year-old G300s and G400s available at $4.5M-$7M per Wikipedia. Total G-IV family production reached over 900 aircraft (GIV + GIV-SP + G300 + G350 + G400 + G450) by the last G450 delivery on January 19, 2018 ending a 30-year production run, replaced by the G500. Gulfstream worldwide service network continues to support the G-IVSP platform.
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Related Aircraft Guides:
- Gulfstream G-IV: Direct Predecessor (1987-1992)
- Gulfstream G400: Renamed Successor (Post-Serial 1500)
- Gulfstream G300: Shorter-Range Variant (2002+)
- Gulfstream G450: Modern Successor (2004-2018)
- Gulfstream G-V: Ultra-Long-Range Sibling
- Gulfstream G550: Modern Ultra-Long-Range Successor
- Gulfstream G-III: Predecessor (1980-1986)
- Bombardier Challenger 604: Direct Twin-Engine Heavy Competitor
Production of the Gulfstream G-IVSP ended 2002 (renamed G400 at serial 1500). All G-IVSP acquisitions are pre-owned. Gulfstream Aerospace provides worldwide parts/support. Specifications accurate as of 2026.