C7.1 China NR4

Cat® C7.1 Diesel Engine

The Cat® C7.1 industrial diesel engine is offered in ratings from 130-205 kW (174-275 hp) and meets China Nonroad Stage IV emission standards. The C7.1 is designed to meet the needs of many industries and applications, including bore/drill rigs, chippers/grinders, material handling, mining, earthmoving equipment, paving equipment, pumps, fruit harvesters equipment, turf and underground mining equipment.


Boasting one of Caterpillar's most modular engine designs to date, the Cat C7.1 also features an engine-mounted aftertreatment that saves OEMs valuable time and space when installing into a wide variety of machines—especially industrial and construction applications. OEMs also enjoy a 20% length, 5% height and 40% weight reduction when downsizing from 9-liter platforms.

Advanced Features

The Cat C7.1 uses passive regeneration technology, so operators can continue to perform their toughest tasks, in the most severe environments, without having to wait on the engine.

Ideal Applications

Industrial, agricultural and construction applications such as: Pumps • Compressors • Chippers • Grinders • Asphalt paving equipment • Hydraulic power units • Bore rigs • Drill rigs • Tractors

Total Cost of Ownership

The benefits to downsizing are many, including an 18% decrease in overall fuel consumption when downsizing from a 6-cylinder engine. With an added 3-4% decrease in overall DEF consumption and EGR integration, the cost savings don't take long to add up.

Cat Dealer Product Support

Scheduled maintenance, five-year warranty, superior dealer service and a comprehensive global dealer support network—it’s all standard with the Cat C7.1.


Validated with thousands of hours of field testing, the Cat C7.1 is built to meet Caterpillar's strict safety standards and customers' most demanding work sites throughout the world.

Documents & Brochures

Standard Equipment

Air Inlet
  • Standard air cleaners
Control System
  • Full electronic control system, all connectors and wiring looms waterproof and designed to withstand harsh off-highway environments
  • Flexible and configurable software features and well-supported SAE J1939 CAN bus enables highly integrated machines
Cooling System
  • Top tank temperature 108° C (226° F) as standard to minimize cooling pack size
  • 50:50 water glycol mix
  • Guidance on cooling system design available through your dealer to ensure equipment reliability
Flywheels and Flywheel Housing
  • Wide choice of drivetrain interfaces, including SAE No. 1, SAE No. 2, and SAE No. 3 configurations
Fuel System
  • Electronic high pressure common rail
  • Innovative filter design to ensure maximum protection of the engine
Lube System
  • Wide choice of sumps for different applications
  • Paint: Caterpillar yellow, with optional colors available on request
Aftertreatment/ Clean Emissions Control Equipment
  • Clean Emissions Module (CEM), consisting of Diesel Particulate Filter (DPF) and Diesel Oxidation Catalyst (DOC)
  • NOx Reduction System (NRS)
  • Selective Catalytic Reduction (SCR)
  • 3" flex pipe connection with straight, 45°, and 90° options for flexibility

Additional information

Offering Type

Power Rating - Maximum Power

205 kW ( 275 HP )

Power Rating - Maximum Torque

1257 Nm @ 1400 rpm ( 927 lb-ft @ 1400 rpm )

Power Rating - Rated Speed

2200 rpm

Power Rating - Minimum Power

130 kW ( 174 HP )

Emission Standards - Emissions

China Nonroad Stage IV

General - Engine Configuration

In-Line 6

General - Bore

105 mm ( 4.13 in )

General - Stroke

135 mm ( 5.3 in )

General - Displacement

7 l ( 427.7 in³ )

General - Compression Ratio


General - Aspiration

Turbocharged-Aftercooled (TA) or Series Turbocharged Aftercooled (TTA)

General - Combustion System

Direct Injection

General - Rotation from Flywheel End


General - Aftertreatment


Engine Dimensions - Approximate - Length

870 mm ( 34.3 in )

Engine Dimensions - Approximate - Width

798 mm ( 31.4 in )

Engine Dimensions - Approximate - Height

911 mm ( 35.9 in )

Engine Dimensions - Approximate - Weight - Net Dry - Basic Operating Engine Without Optional Attachments

845 kg ( 1863 lb )

Aftertreatment Dimensions - Length

733 mm ( 29 in )

Aftertreatment Dimensions - Width

769 mm ( 30.3 in )

Aftertreatment Dimensions - Height

455 mm ( 18.1 in )

Aftertreatment Dimensions* - Diameter

338 mm ( 13.3 in )

Aftertreatment Dimensions - Weight

107 kg ( 236 lb )

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