Comparison of Bell AH-1Z Viper and Sikorsky S-76C++

Attribute	Bell AH-1Z Viper ×	Sikorsky S-76C++ ×
General
Manufacturer	Bell Helicopter	Sikorsky Helicopter
Model	Bell AH-1Z Viper	Sikorsky S-76C++
Country	United States	United States
Manufactured from (year)	2008	2006
Type	Military Helicopters	Large Helicopters
Icao	AH1Z	-
Performance
Engine	2x 2 × General Electric T700-GE-401C turboshaft	2 × Turboméca Arriel 2S1 turboshafts -
Power, hp (hp)	1,800	922
Avionics	THALES Avionics TopOwl HMS/D	Honeywell Avionics
Max cruise speed (km/h)	370	287
Travel range (km)	685	639
Fuel economy (km/l)	0.68	0.602
Service ceiling (m)	6,096	4,572
Rate of climb (m/sec)	14.17	6.86
Weights
Max take off weight (kg)	8,392	5,307
Max payload (kg)	2,614	1,575
Fuel tank capacity (l)	1,561	1,064
Baggage volume (m³)	-	1
Dimensions
Seats	2	12
Cabin height (m)	-	1.35
Cabin width (m)	-	1.93
Cabin length (m)	-	2.41
Exterior length (m)	17.67	16
Tail height (m)	4.31	-
Fuselage diameter (m)	0.83	-
Wing span (m)	14.6	13.41
Wing tips	No Winglets	-