The multi-mission AH-64D Apache Longbow is the next-generation version of original AH-64A Apache. With its fire-control radar, the aircraft is known as the AH-64D Apache Longbow. Without the radar, the combat-proven aircraft is called the AH-64D Apache.

General characteristics:
Crew: 2 (pilot, and co-pilot/gunner)
Length: 58.17 ft (17.73 m) (with both rotors turning), Rotor diameter: 48 ft 0 in (14.63 m), Height: 12.7 ft (3.87 m), Disc area: 1,809.5 ft² (168.11 m²), Fuselage length: 49 ft 5 in (15.06 m)
Empty weight: 11,387 lb (5,165 kg), Loaded weight: 17,650 lb (8,000 kg), Max takeoff weight: 23,000 lb (10,433 kg)
Powerplant: 2 × General Electric T700-GE-701 (1,690shp) and later upgraded to T700-GE-701C (1,890 shp) (1990–present) & T700-GE-701D (2,000 shp) (AH-64D block III) turboshafts.
Rotor systems: 4 blade main rotor, 4 blade tail rotor in non-orthogonal alignment

Performance:
Never exceed speed: 197 knots (227 mph, 365 km/h), Maximum speed: 158 knots (182 mph, 293 km/h), Cruise speed: 143 knots (165 mph, 265 km/h)
Range: 257 nmi (295 mi, 476 km) with Longbow radar mast, Combat radius: 260 nmi (300 mi, 480 km) Ferry range: 1,024 nmi (1,180 mi, 1,900 km)
Service ceiling: 21,000 ft (6,400 m) minimum loaded, Rate of climb: 2,500 ft/min (12.7 m/s)
Disc loading: 9.80 lb/ft² (47.9 kg/m²), Power/mass: 0.18 hp/lb (0.31 kW/kg)

Armament: Guns 1× 30 × 113 mm (1.18 × 4.45 in) M230 Chain Gun with 1,200 rounds Hardpoints Four pylon stations on the stub wings. Longbows also have a station on each wingtip for an AIM-92 ATAS twin missile pack.[47][199] Rockets Hydra 70 70 mm, and CRV7 70 mm air-to-ground rockets Missiles Typically AGM-114 Hellfire variants; AIM-92 Stinger may also be carried.

Avionics: Lockheed Martin / Northrop Grumman AN/APG-78 Longbow fire-control radar[200] (Note: can only be mounted on the AH-64D)

For more information check out http://www.boeing.com/rotorcraft/military/ah64d/index.htm