Rolls-Royce AE 2100

AE 2100
The Rolls-Royce AE 2100 D2A on a C-27J
Type Turboprop
National origin United States
Manufacturer Allison Engine Company
Rolls-Royce plc
Major applications Alenia C-27J Spartan
Lockheed Martin C-130J Hercules
Saab 2000
ShinMaywa US-2
Number built 2,300+
Developed from Rolls-Royce T406

The Rolls-Royce AE 2100 is a turboprop developed by Allison Engine Company, now part of Rolls-Royce North America. The engine was originally known as the GMA 2100, when Allison was a division of former corporate parent General Motors.