The UK carrier is also forming an environmental partnership with Rolls-Royce, under which both companies will work together to continually lower fuel-burn and emissions.
Speaking during a media briefing in New York today, Virgin president Sir Richard Branson said: "Virgin has chosen the cleanest possible engines for its more fuel-efficient future with the 787.
"Rolls-Royce engines will help us to cut emissions per flight by nearly 30% as we pursue our goal to become the most sustainable airline in the world."
Virgin values the deal, which includes four spare engines, at $2.6 billion at list prices. The UK carrier has a keen environmental focus and recently performed a biofuel test flight using a Boeing 747.
It says the 787-9 will burn 27% less fuel than its A340-300s. Virgin has 15 787-9s on order, with options on a further eight and purchase rights on 20 more.
Source: flightglobal.com's sister premium news site Air Transport Intelligence news