G-drive Engine
Cummins NTAA855 Generator Drive Diesel Engine (460–506 hp)
Cummins NTAA855 14.0 L 6-cylinder diesel engine, 460–506 hp (343–377 kW), 2 ratings for generator drive work. Each unit nameplate-verified.
Specifications
- Engine Model
- NTAA855-G7 ~ G7A
- Displacement
- 14.0 L
- Cylinders & Configuration
- Inline 6, 4-cycle
- Rated Power Range
- 343–377 kW (460–506 hp) @ 1500 rpm
- Aspiration
- Turbocharged Aftercooled
- Applications
- Generator Drive
- Documentation
- Nameplate verification + load-test record per serial number
Overview
The Cummins NTAA855 is a 14.0 L 6-cylinder Cummins diesel engine supplied in 2 factory ratings from 460 hp (343 kW) to 506 hp (377 kW). Every rating listed on this page is a complete engine for generator drive 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 NTAA855 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: NTAA855 Ratings
Each entry in this section is one rating of the Cummins NTAA855. 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.
NTAA855-G7
NTAA855-G7 — rated 343 kW (460 hp) at 1500 rpm.
NTAA855-G7A
NTAA855-G7A — rated 377 kW (506 hp) at 1500 rpm.
Applications
NTAA855 engines in this family are normally specified for generator drive work.
Generator drive: ratings here are quoted at a fixed governed speed, and the engine is matched to the alternator frame and the prime/standby duty that the site actually needs.
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 NTAA855-G7A), 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 NTAA855 specification, quantity and destination port for a verified quotation and lead time.
Frequently Asked Questions
What is the power range of the NTAA855?
The 2 ratings listed on this page run from 460 hp (343 kW) to 506 hp (377 kW).
What displacement and cylinder count does the NTAA855 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 NTAA855-G7 and NTAA855-G7A?
NTAA855-G7 is rated 343 kW (460 hp) at 1500 rpm, while NTAA855-G7A is rated 377 kW (506 hp) at 1500 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 NTAA855 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.
At what speed is the NTAA855 rated?
The ratings on this page are governed at 1500 rpm. Rated speed fixes the speed the driven machine sees through its gearing, so confirm the governed speed before ordering rather than relying on the power figure alone.
Is the NTAA855 a complete engine or a generator set?
Every entry on this page is a complete engine. Generator sets and packaged gen-sets are listed separately from this family and are not included here.
