Comparing The 2 Boeing 787 Dreamliner Engines

Comparing the Two Boeing 787 Dreamliner Engines
Rolls-Royce and General Electric: Key Players in the Widebody Engine Market
While Pratt & Whitney and Safran have shifted their focus primarily to narrowbody aircraft, the Boeing 787 Dreamliner—like the Airbus A380—offers airlines a choice between two major widebody engine manufacturers: General Electric and Rolls-Royce. Specifically, customers can select either the General Electric GEnx-1B or the Rolls-Royce Trent 1000, often basing their decision on factors such as existing fleet compatibility, operational efficiency, and long-term cost considerations. For instance, Air Canada opted for GEnx engines on its 787-10s to maintain consistency with its existing 787-8 and 787-9 fleet.
Boeing 787 Dreamliner Engine Options
Since entering service over a decade ago, the Boeing 787 Dreamliner has become a mainstay in long-haul aviation, available in three variants: the 787-8, 787-9, and 787-10. Each model can be equipped with either the GEnx-1B or Trent 1000 engines. According to Boeing, the Dreamliner family has completed more than 4.5 million flights and transported 900 million passengers.
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Boeing 787-8
- Passengers (two-class): 248
- Range: 7,305 nautical miles
- Length: 186 feet
- Engines: GEnx-1B / Trent 1000
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Boeing 787-9
- Passengers (two-class): 296
- Range: 7,565 nautical miles
- Length: 209 feet
- Engines: GEnx-1B / Trent 1000
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Boeing 787-10
- Passengers (two-class): 336
- Range: 6,330 nautical miles
- Length: 224 feet
- Engines: GEnx-1B / Trent 1000
As of late 2024, Boeing has received approximately 2,000 orders for the Dreamliner, with the 787-9 being the most popular variant. Of these, 796 aircraft are yet to be delivered.
Engine Comparison and Market Trends
Airlines have traditionally had the flexibility to choose between the two engine options, but recent trends show a decisive shift toward General Electric’s GEnx-1B. The GEnx now powers about two-thirds of all 787s in service, reflecting its growing dominance in the market. This preference is largely driven by the GEnx’s superior fuel efficiency, which translates into significant cost savings for airlines—a critical factor as carriers seek to optimize operational expenses. In contrast, the Rolls-Royce Trent 1000 is recognized for its durability but generally incurs higher fuel costs, making it less attractive in an industry increasingly focused on efficiency.
Engine Specifications:
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Rolls-Royce Trent 1000
- First run: 2006
- Fan diameter: 112 inches
- Thrust: 64,100–74,400 lbf
- Bypass ratio: 10:1
- Mass: 13,087–13,492 lbs
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General Electric GEnx-1B
- First run: 2006
- Fan diameter: 111.1 inches
- Thrust: 69,800–76,100 lbf
- Bypass ratio: 8.0–9.0 (takeoff)
- Mass: 13,552 lbs (dry weight)
Order data underscores this shift. Before December 2016, engine selections were relatively balanced, with 886 orders for the GEnx and 640 for the Trent 1000. Since then, the market has tilted sharply: between 2017 and October 2024, 640 out of 736 specified engine orders favored the GEnx, while only 96 went to the Trent 1000. Notably, Thai Airways’ February 2024 order for 45 Boeing 787-9s exclusively selected GEnx engines.
In total, of the 2,388 Dreamliners ordered, 1,526 have been equipped with GEnx engines and 550 with Trent 1000s, with the remainder unspecified. This trend highlights airlines’ increasing confidence in the GEnx’s performance and cost-effectiveness, as operational efficiency and fuel savings become ever more critical in the competitive aviation landscape.

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