The Allison Engine Company was a U.S. aircraft engine manufacturer which was acquired by Rolls-Royce plc in 1995 to become a subsidiary, Rolls-Royce Corporation.
The Allison Engine Company was a U.S. aircraft engine manufacturer. Owned by General Motors for most of its history, the company was acquired by Rolls-Royce plc in 1995 to become a subsidiary, Rolls-Royce Corporation.