How Airbus & Boeing Quietly Killed Engine Choice On Every New Widebody Aircraft

Both Airbus' and Boeing's flagship widebody aircraft, the A350 and 777X, respectively, come with just one engine option. This leaves airlines who order either type committed to a decades-long relationship with Rolls-Royce for Airbus orders or General Electric for Boeing ones. This marks a major shift from the long-standing norm of offering multiple engine options for every aircraft type, with the 787 as the last widebody to offer more than one engine. In fact, older widebodies that continue to define long-haul travel today, like the 777, can be installed with engines from General Electric, Rolls-Royce, or Pratt & Whitney, providing a tremendous degree of flexibility between manufacturers that today's widebodies simply do not. While this growing trend is not necessarily a negative one, Boeing and Airbus together have all but killed engine choice on every new widebody aircraft. The 787, 777X, A330neo & A350: Boeing and Airbus' Modern Widebody Strategy Credit: Falcons Spotters | Shutterstock The disappearance of engine choice across the widebody market began when Airbus and Boeing started drafting blueprints for new modern widebody aircraft in the early 2000s. When Boeing announced the 787 Dreamliner in 2003, it chose to preserve the choice airlines traditionally had up until then by engineering a standardized wing-engine surface. This decision let the 787 accept either General Electric or Rolls-Royce engines, giving airlines the option to choose what best suited their operations. By contrast, Airbus' A350 program took a different route. Initially envisioned as a slightly redesigned variant of the A330, Airbus soon chose to develop a clean-sheet widebody design to compete with Boeing's hugely successful 777 line as well as its upcoming 787. With this design, Airbus elected not to engineer the wing to accommodate competing engines; rather, the European manufacturer partnered exclusively with Rolls-Royce, building both variants of the A350 around the Trent XWB engine to maximize efficiency and lower costs. Why Airbus Effectively Made Rolls-Royce Its Widebody Engine Manufacturer Credit: Falcons Spotters | Shutterstock In today's aircraft market, Airbus provides the clearest example of the industry's movement toward sole-source widebody engines. The Airbus A350 was built around Rolls-Royce's Trent XWB, with the engine and aircraft developed as a closely integrated combination. The two variants in the A350 family, the A350-900 and A350-1000, use variations of the same XWB engine: the -900 uses the XWB-94, while the larger A350-1000 uses the XWB-97. Airbus applied the same philosophy to the A330neo. Although the original A330 could be ordered with engines from Rolls-Royce, Pratt & Whitney, or General Electric, Airbus launched the A330neo centered solely on the Trent 7000. With a 112-inch fan and 10:1 bypass ratio, the Trent 7000 and A330neo deliver 25% lower fuel burn than previous-generation competitors. Airbus' increased reliance on Rolls-Royce centers on commercial, financial, and technical factors. Airbus can optimize the wing, nacelle, pylon, and aircraft systems around one engine rather than accommodate multiple competing designs. The Trent 7000, for example, was developed alongside the A330neo's larger 64-meter wingspan, new wingtip devices and aerodynamic improvements. That tight integration helps explain how Airbus can advertise a 25% fuel-burn reduction compared with previous-generation computing aircraft. But it also means that an airline like Scandinavian Airlines (SAS), which recently ordered an A330neo or A350, has effectively accepted Rolls-Royce as its engine supplier before the aircraft even arrives. SAS & The A330neo: Locked In To A Decades-Long Reliance On Rolls-Royce Credit: Airbus SAS' 2026 A330neo order provides an unusually clear example of what this means in practice for an airline. In June, SAS and Airbus announced the carrier's largest aircraft order in the carrier's history, purchasing 18 firm A330neos with options for an additional 10 airframes in addition to two leased aircraft of the same type. All 38 of these aircraft are or will be powered by Rolls-Royce Trent 7000 engines, making Rolls-Royce the exclusive engine manufacturer for SAS's A330neo fleet. The significance of choosing the A330neo with its sole engine choice of the Trent 7000 becomes even more clear when the new A330neos are compared with the eight legacy A330-300s they are complementing. The original A330 could be equipped with engines from three different manufacturers: GE, Pratt & Whitney, or Rolls-Royce. SAS therefore once could compare competing engines on the same widebody platform, a choice that has disappeared with the A330neo. NEW Catch what other flight trackers miss Emergency squawks, holds, NOTAMs — unique signals, live, no signup. Open tracker → NEW Catch what other flight trackers miss Emergency squawks, holds, NOTAMs — unique signals, live, no signup. Open tracker → There are several compelling reasons for SAS to commit to Rolls-Royce and its Trent 7000 offering. The Trent 7000 delivers a 14% improvement in fuel burn per seat compared with the previous generation, while also reducing fuel burn, CO2 emissions, and operating costs by 25% compared to older aircraft. The A330neo and Trent 7000 can also operate on a blend of up to 50% sustainable aviation fuel (SAF) today, with hopes to increase that to 100% by the end of the decade. So while the A330neo and Trent 7000 combination has many benefits, it also means SAS is forced into a decades-long relationship with Rolls-Royce as long as it chooses to operate the A330neo in its fleet, a challenge airlines opting for Boeing aircraft are also increasingly facing. From 2 To 1: The 777X Will Only Have 1 Engine Option Vs. 2 For The 787 Credit: Ronen Fefer | Simple Flying Boeing's strategy shows that the trend of fewer engine options isn't limited to Airbus aircraft. The Boeing 787 was designed with two competing engine choices: the General Electric GEnx-1B and the Rolls-Royce Trent 1000. Those engines gave airlines a choice between GE and Rolls-Royce based on fuel efficiency, reliability, maintenance arrangements, and existing fleet commonality. While the 787 gives airlines engine options, the upcoming 777X, expected to be certified in early 2027, eliminates that choice. The 777-8, 777-9, and 777-8F are all designed using the GE9X. As one of the highest-thrust commercial aircraft engines ever produced, the GE9X is rated at 110,000 pounds of thrust and provides a 5% improvement in fuel consumption when compared to competing engines and a 10% reduction compared to the GE90 used by the older 777-300ER. Like the A330 family, the 777X, compared with the previous generation of 777 aircraft like the 777-200 and 777-300, also goes from 3 engine choices to just one. The 777s produced from the 1990s to now can be ordered with the GE90, Trent 800, or PW4000 engines, allowing airlines to select the engine best suited to their fleets and mission types. The 777X, by contrast, is a tightly integrated GE-Boeing product, with GE developing the enormous GE9X specifically for the 777X. The result is an airframe and powerplant that deliver significant efficiency improvements on new widebodies, but gives airlines no alternative engine supplier to negotiate against going forward. Related Rolls-Royce Trent XWB Vs. General Electric GE9X? Which Engine Is More Powerful? The GE9X is more powerful than the Trent XWB, although there is more than thrust that makes a good engine. How Will Future Aircraft Be Impacted By Engine Monopolies? Credit: Falcons Spotters | Shutterstock For airlines, the disappearance of engine choice creates both benefits and risks. A sole-source engine can be optimized to perform and fit a specific airframe, typically generating lower fuel burn and lower operating costs. However, with fewer engine options, airlines face significantly decreased leverage. A carrier operating a 787 could switch engine manufacturers relatively easily (ignoring potential contract issues) if it becomes dissatisfied with Rolls-Royce or GE. However, those who have ordered or already operate the 777X, A330neo, and A350 are committing to GE for Boeing or Rolls-Royce for Airbus for the over 20 years of the aircraft's life. This issue is not only affecting widebody aircraft, however. In fact, the engine issues plaguing the A220 family related to the Pratt & Whitney GTF engine show the potentially disastrous consequences of maintaining a sole engine option for any aircraft family. Due to various reasons that have been covered by Simple Flying before, hundreds of A220s around the world have been grounded as a result of accelerated engine degradation. If the A220 had been built with two engine options, airlines could have pivoted their future orders or retrofitted current fleets with the second option. However, since only the P&W GTF engine is available for the A220, some airlines, like SWISS, have retired entire fleets of practically new aircraft. On the widebody side, the same core issue of only a single engine manufacturer being available for a given aircraft has affected the fleet plans of some major airlines, including United Airlines. In February, United announced it canceled its order for up to 45 Airbus A350-900s, aircraft the carrier had been expecting to join its fleet for over 17 years. The reason behind the cancellation is rooted in a $175 million dispute with Rolls-Royce, and, since no other engine option is available for the A350, United decided to end its relationship with Rolls-Royce and cancel its A350 order, an aircraft that would have played a crucial role in replacing the carrier's aging 777 fleet. While significant issues with GE and Rolls-Royce engines available for today's modern widebodies have not arisen, what is currently happening with the A220 and United's A350 cancellation shows the potential consequences of aircraft with just one engine option compared to older aircraft with multiple. Despite this, the trend toward sole-source engines is likely to continue as the next generation of aircraft becomes even more technologically advanced. For passengers, this growing shift will be almost invisible, but for airlines, selecting a new widebody means choosing an engine manufacturer and building a relationship at the same time. Quiz 5 Questions Locked-In Powerplants: How Engine Choices Shape Modern Widebodies Your Top Score -- Attempts -- Start Quiz 0 0