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Power Rating
	Cat® C4.4 Industrial Power Unit View Product	Cat® C27 Industrial Power Unit View Product Remove	Cat^® C9.3B Industrial Power Unit HRC View Product Remove	Cat^® C9.3B Industrial Power Unit View Product Remove
Maximum Power	129.4 HP	950 HP	456 HP	416 HP
Rated Speed	2200 rpm	1800 rpm	1800-2200 rpm	1800-2200 rpm
Minimum Power	129.4 HP	800 HP	335 HP	308 HP
Maximum Torque	-	3211 lb-ft @ 1200 rpm	1540 lb-ft @ 1400 rpm	-
Emission Standards
Emissions	China Nonroad Stage III, Brazil MAR-1, UN ECE R96 Stage IIIA	U.S. EPA Tier 4 Final, EU Stage V	EU Stage V, U.S. EPA Tier 4 Final, Korea Stage V, Japan 2014 (Tier 4 Final) and China Nonroad IV	Brazil MAR-1, UN R96 Stage IIIA
General
Engine Configuration	Inline 4, 4-Stroke-Cycle Diesel	V-12, 4-Stroke-Cycle Diesel	Inline 6, 4-Stroke-Cycle-Diesel	Inline 6, 4-Stroke-Cycle-Diesel
Bore	4.1 in	5.7 in	4.5 in	4.5 in
Stroke	5 in	6 in	5.9 in	5.9 in
Displacement	268.5 in³	1649.5 in³	567.5 in³	567.5 in³
Compression Ratio	16.2:1	16.0:1	17.0:1	16.5:1
Aspiration	Turbocharged Aftercooled (TA)	Twin Turbocharged-Aftercooled (TTA)	Turbocharged Aftercooled (TA)	Turbocharged Aftercooled (TA)
Rotation from Flywheel End	Counterclockwise	Counterclockwise	Counterclockwise	Counterclockwise
Aftertreatment	-	DOC	DOC+DPF+SCR	-
Power Unit Dimensions
Length	53.5 in	-	83 in	83 in
Width	29.5 in	-	43 in	43 in
Height	37.9 in	-	68.5 in	63 in
Weight	1146 lb	-	3563 lb	3265 lb
Aftertreatment Dimensions
Width	-	-	34.3 in	-
Height	-	-	22.4 in	-
Weight	-	-	468 lb	-
Aftertreatment Dimensions*
Diameter	-	-	13 in	-