Long-haul budget carrier Scoot will fit its new Boeing 787 aircraft with Rolls-Royce's Trent 1000 engine.
The 20 planes will join the fleet from late 2014.
The engine was selected from among two competing models,
Scoot's announcement on Friday came shortly after a similar decision by its parent Singapore Airlines.
SIA has picked the same engine to power its Boeing 787-10X which is slated to enter into commercial service from 2018.
Both carriers have also asked Rolls Royce to maintain, repair and overhaul the engines, as well as provide spare engine support.
Scoot which started operating a year ago flies to 10 cities including Sydney and Gold Coast in Australia, as well as Bangkok, Taipei and Tokyo.