In August 2014, Rolls-Royce standardized their product line model numbers to make it easier to identify products on a global basis. Each segment of the model number is an identifier that gives you information about the engine, the fuel type, and the power node. For example, a 16V4000 DS2250 tells you that this is a 16-cylinder, mtu Series 4000 engine in the first segment. The second segment tells you that this is a 2,250kW diesel system.
This makes perfect sense when you understand how to interpret the model number. It gives you a great deal of information about the engine that you may not have known otherwise and would have had to reference a spec sheet to obtain.
To better understand the engine identifier in the first segment, the first 2 or 3 digits tell you the number of cylinders and configuration:
- In-line configurations are identified by the number of cylinders and an “R” (e.g., 3R, 4R, 6R)
- Vee configurations are identified by the number of cylinders and a “V” (e.g., 8V, 10V, 12V, 16V, 20V)
The four numbers after the configuration letter identify the type of engine:
- mtu manufactured engines use the Engine Series (e.g., Series 1600, Series 2000, or Series 4000)
- Engines from other OEMs use the displacement per cylinder as the identifier. (e.g., a 4R0113 is a 4.5 liter engine: 113 x 4 cyl = 452 rounded to 4.5L)
To help identify the engines and OEM, use the following as a guide:
- 3R0096 = John Deere 3029 Series (3.0L)
- 4R0063 = mtu SI Series (2.5L)
- 4R0113 = John Deere 4045 Series (4.5L)
- 4R0120 = Mercedes-Benz OM924 Series (4.8L)
- 6R0113 = John Deere 6068 Series (6.8L)
- 6R0120 = Mercedes-Benz OM926 Series (7.2L)
- 6R0135 = Doosan/PSI (8.1L)
- 6R0185 = Doosan/PSI (11.1L)
- 8V0078 = mtu SI Series (6.2L)
- 8V0183 = Doosan/PSI (14.6L)
- 10V0068 = mtu SI Series (6.8L)
- 10V0183 = Doosan/PSI (18.3L)
- 12V0183 = Doosan/PSI (21.9L)
Download a copy of Rolls-Royce’s Structure Definition for quick reference.
The second segment tells you the type of fuel and the power node:
- Fuel type is a “DS” for diesel system or a “GS” for gaseous system
- Power node for 60 Hz (US) systems is in kilowatts (kWe). For 50 Hz models, the power node is expressed in kilovolts (kVA)
The power node referenced in the model number is for Standby (3D) applications. Prime (3B) and Data Center Continuous Power (3F) applications still use the standby power node to identify the model number, however, the actual rating is listed on the model’s specification sheet for the application and in the table below.
For more information about Rating Definitions for Rolls-Royce Generator Sets click here or download the mtu Technical Article: Understanding Generator Ratings for Maximum Performance and Reliability.