Construction Engine
Cummins NTA855 Industrial Diesel Engine (310–450 hp)
Cummins NTA855 14.0 L 6-cylinder diesel engine, 310–450 hp (231–336 kW), 7 ratings for construction work. Each unit nameplate-verified.
Specifications
- Engine Model
- NTA855
- Displacement
- 14.0 L
- Cylinders & Configuration
- Inline 6, 4-cycle
- Rated Power Range
- 231–336 kW (310–450 hp) @ 1800–2100 rpm
- Aspiration
- Turbocharged Aftercooled
- Applications
- Construction
- Documentation
- Nameplate verification + load-test record per serial number
Overview
The Cummins NTA855 is a 14.0 L 6-cylinder Cummins diesel engine supplied in 7 factory ratings from 310 hp (231 kW) to 450 hp (336 kW). Every rating listed on this page is a complete engine for construction duty, not a generator set, and each unit ships with its serial number recorded against the specification sheet that applies to it.
Ratings in this family differ in rated speed, peak torque and emissions tier rather than in displacement or cylinder count, so the choice between them is a duty-matching question. The specifications panel and the per-rating entries on this page are generated from the same source data, so a rating quoted here can be matched directly against a delivery document.
Specifications
The specifications panel lists the family-level values that are common to every NTA855 rating, including the 14.0 L displacement and the inline 6-cylinder layout. Ratings that share displacement and cylinder count but differ in output are listed individually in the model selection section.
Model Selection: NTA855 Ratings
Each entry in this section is one rating of the Cummins NTA855. The rated power is the output at the stated speed; the peak torque figure is the value the rating develops at the lower speed shown, which is what normally decides whether a rating suits a given machine. Each rating carries a stable anchor, so a single rating can be linked or quoted directly.
NTA855-C310
NTA855-C310 — rated 231 kW (310 hp) at 2100 rpm.
NTA855-C335
NTA855-C335 — rated 250 kW (335 hp) at 2100 rpm.
NTA855
NTA855 — rated 261 kW (350 hp) at 1800 rpm.
NTA855-C360
NTA855-C360 — rated 269 kW (360 hp) at 2100 rpm.
NTA855-C400
NTA855-C400 — rated 298 kW (400 hp) at 2100 rpm.
NTA855-C420
NTA855-C420 — rated 313 kW (420 hp) at 2100 rpm.
NTA855-C450
NTA855-C450 — rated 336 kW (450 hp) at 2100 rpm.
Applications
NTA855 engines in this family are normally specified for construction work.
Construction duty: the ratings with the higher peak torque are the ones normally quoted for loaders, dozers and haul trucks, where the engine has to hold torque under a sudden increase in load at low ground speed.
Duty cycle: the lower ratings in the same family are used where the duty cycle is closer to continuous and the installed package limits the cooling or the coupling that can be fitted.
Verification, Documentation and Ordering
Each engine is offered with nameplate verification + load-test record per serial number. That means the model and rating printed on the engine nameplate can be checked against the record issued for that serial number before shipment, which is the point most buyers of re-rated or re-exported engines want covered.
To receive a quotation, send the exact rating from the matrix above (for example NTA855-C450), the machine or application it will drive, the quantity, and the destination port. If the rating you need is not listed, send the model and the required output and we will confirm whether it belongs to this family or to a neighbouring one.
Buyer tip: Send your NTA855 specification, quantity and destination port for a verified quotation and lead time.
Frequently Asked Questions
What is the power range of the NTA855?
The 7 ratings listed on this page run from 310 hp (231 kW) to 450 hp (336 kW), at governed speeds between 1800 and 2100 rpm.
What displacement and cylinder count does the NTA855 use?
Every rating in this family shares the same 14.0 L displacement and inline 6-cylinder, 4-cycle configuration. Ratings differ in output, rated speed and emissions tier rather than in the base engine.
What is the difference between NTA855-C420 and NTA855-C450?
NTA855-C420 is rated 313 kW (420 hp) at 2100 rpm, while NTA855-C450 is rated 336 kW (450 hp) at 2100 rpm. They use the same base engine; the higher rating is the one to specify when the driven load needs the extra torque at the lower speed.
How is a NTA855 rating ordered?
Send the exact rating shown in the model selection table, the application it will drive, the quantity and the destination port. The engine is then quoted against that rating and confirmed against its nameplate and load-test record.
