The Most Reliable Aircraft Engine: A Comprehensive Ranking

Choose the aircraft engine you think is the most reliable!

Author: Gregor Krambs
Updated on Feb 20, 2024 06:45
Welcome to StrawPoll, the ultimate destination for passionate aviation enthusiasts and experts alike! We're excited to present our latest ranking: "What is the most reliable aircraft engine?" With thousands of polls and rankings on various topics, we're now soaring to new heights with this crucial question. As you explore the world of aviation and marvel at the engineering marvels that power our skies, it's time to have your say! Vote for your favorite powerhouse that defines reliability, efficiency, and performance in aircraft engines. Don't see your top choice listed? Don't worry – you can effortlessly suggest a missing option to make this ranking truly comprehensive. Get ready to embark on an exhilarating journey and discover which engine reigns supreme in the world of aviation. Cast your vote, share your thoughts, and help us create the ultimate list of reliable aircraft engines that keep our skies safe and our flights smooth. The sky's the limit here at StrawPoll!

What Is the Most Reliable Aircraft Engine?

  1. 1

    Pratt & Whitney PW4000

    Pratt & Whitney
    This engine has been praised for its reliability and durability, and has a low rate of in-flight shutdowns.
    The Pratt & Whitney PW4000 is a high-thrust aircraft engine designed for large commercial aircraft. It is a popular choice among airlines for its reliability and performance.
    • Thrust: 52,000 - 98,000 lbf
    • Bypass Ratio: 5:1 - 6:1
    • Fan Diameter: 87 - 94 inches
    • Length: 170 - 213 inches
    • Dry Weight: 8,400 - 10,000 lbs
    Pratt & Whitney PW4000 in other rankings
  2. 2

    General Electric CF6

    General Electric Aviation
    This engine has been in service for over 40 years and has a reputation for reliability and low maintenance costs.
    The General Electric CF6 is a high bypass turbofan jet engine developed by General Electric Aviation. It is widely used in various commercial aircraft models and has been consistently upgraded to maintain its advanced performance.
    • Thrust Range: 49,000 to 63,500 pounds
    • Fan Diameter: 86.4 inches
    • Overall Pressure Ratio: 32:1
    • Bypass Ratio: 5.2:1
    • Specific Fuel Consumption: 0.54 lb/lbf/hr
    General Electric CF6 in other rankings
  3. 3
    Rolls-Royce Trent
    Julian Herzog (Website) · CC BY 4.0

    Rolls-Royce Trent

    Rolls-Royce plc
    This engine is known for its high fuel efficiency and low emissions, and has a good track record for reliability.
    The Rolls-Royce Trent is a family of high-performance aircraft engines manufactured by Rolls-Royce plc. These engines are widely recognized for their reliability, efficiency, and advanced technology.
    • Engine type: Turbofan
    • Thrust range: 63,000 to 97,000 pounds
    • Fan diameter: 112 inches
    • Engine length: 155 to 209 inches
    • Dry weight: 14,500 to 16,300 pounds
  4. 4
    CFM International CFM56
    David Monniaux · CC BY-SA 3.0

    CFM International CFM56

    CFM International
    This engine is used on many popular commercial airliners and has a reputation for reliability and low maintenance costs.
    The CFM International CFM56 is a highly popular jet engine that powers various commercial aircraft. It is a product of CFM International, a joint venture between General Electric (GE) Aviation and Safran Aircraft Engines. The CFM56 has been in service since the late 1970s and has gained a reputation for its reliability, efficiency, and performance.
    • Engine type: High-bypass turbofan
    • Thrust range: 18,500-34,000 pounds
    • Bypass ratio: 5.9:1 to 6.9:1
    • Overall pressure ratio: 32:1 to 37:1
    • Fan diameter: 61-80 inches
    CFM International CFM56 in other rankings
  5. 5
    Pratt & Whitney JT9D
    Jaypee · CC BY-SA 3.0

    Pratt & Whitney JT9D

    Pratt & Whitney
    This engine was one of the first high-bypass turbofan engines and has a long track record of reliable service.
    The Pratt & Whitney JT9D is a high-bypass turbofan aircraft engine. It was developed in the late 1960s and was widely used on commercial airliners such as the Boeing 747. The engine was designed to offer improved fuel efficiency and reduced noise levels compared to previous engines.
    • Thrust: 43,500 to 50,000 pounds
    • Bypass ratio: 5.2:1
    • Length: 272.9 inches
    • Diameter: 88.3 inches
    • Weight: 8,200 to 8,480 pounds
  6. 6
    Rolls-Royce RB211
    Nimbus227 · Public domain

    Rolls-Royce RB211

    Rolls-Royce Limited
    This engine has been in service for over 40 years and has a reputation for reliability and durability.
    The Rolls-Royce RB211 is a renowned aircraft engine that was developed by Rolls-Royce Limited. It has established a reputation for reliability and efficiency since its introduction in the 1970s.
    • Type: Three-spool high bypass turbofan engine
    • Thrust: 40,000 to 60,600 pounds
    • Length: 150 inches
    • Weight: 7,570 to 8,660 pounds
    • Compressor: 10-stage axial
  7. 7
    General Electric GE90
    David Monniaux · CC BY-SA 3.0

    General Electric GE90

    General Electric
    This engine is one of the most powerful commercial airliner engines and has a good track record for reliability.
    The General Electric GE90 is a high-bypass turbofan aircraft engine that is widely considered one of the most popular and successful engines in the aviation industry. It is utilized primarily on wide-body airliners and has a proven track record of reliability and performance.
    • Thrust: Between 76,500 and 115,540 lbf
    • Bypass ratio: 5.5:1
    • Thrust-to-weight ratio: 5.77:1
    • Fan diameter: 128 inches
    • Compressor: Twin-spool, axial flow, 14-stage high-pressure compressor
    General Electric GE90 in other rankings
  8. 8
    Pratt & Whitney PW1100G
    Bin im Garten · CC BY-SA 3.0

    Pratt & Whitney PW1100G

    Pratt & Whitney
    This engine is one of the latest designs and features advanced technology for fuel efficiency and low emissions, with a good track record for reliability.
    The Pratt & Whitney PW1100G is a high-bypass geared turbofan aircraft engine designed for commercial aviation. It is part of the PW1000G family, which offers improved fuel efficiency, reduced emissions, and lower noise levels compared to traditional engines. The engine incorporates innovative technologies to enhance performance and reliability.
    • Thrust: 27,000-33,000 pounds
    • Bypass ratio: 12-15:1
    • Fan diameter: 81 inches
    • Takeoff thrust: 130-160 kN
    • Overall pressure ratio: 50:1
  9. 9

    Rolls-Royce Trent XWB

    This engine is one of the most advanced designs with many new features for fuel efficiency and low emissions, and has a good track record for reliability.
    The Rolls-Royce Trent XWB is an advanced jet engine designed for large commercial aircraft. It is a member of the Trent engine family, developed by Rolls-Royce, which is renowned for its high-performance and fuel efficiency. The Trent XWB is specifically designed for the Airbus A350 XWB series, delivering exceptional performance and reliability.
    • Thrust: up to 97,000 lbf
    • Fan diameter: 118 inches
    • Length: 216 inches
    • Weight: 12,890 lb
    • Bypass ratio: up to 10:1
    Rolls-Royce Trent XWB in other rankings
  10. 10

    Honeywell HTF7000

    Honeywell Aerospace
    This engine is used on many popular business jets and has a reputation for reliability and low maintenance costs.
    The Honeywell HTF7000 is a highly reliable aircraft engine designed for business jets. It is known for its performance, durability, and fuel efficiency. The engine was created by Honeywell Aerospace, a multinational company specializing in aerospace technology and equipment.
    • Thrust: Up to 7,624 lbf
    • Bypass ratio: 4.2:1
    • Pressure ratio: 25.5:1
    • Maximum continuous power: 7,000 lbf
    • Length: 123.3 inches

Missing your favorite aircraft engine?


Ranking factors for reliable aircraft engine

  1. Service record
    This includes factors such as the overall reliability of the engine over time, the number of in-flight shut-downs, and how quickly issues are resolved.
  2. Safety record
    How well the engine performs in terms of preventing accidents or incidents.
  3. Maintenance and support
    The ease and cost of servicing and maintaining the engine, as well as the availability of parts and support from the manufacturer.
  4. Fuel efficiency
    The engine's fuel consumption and how much it costs to run.
  5. Performance
    How well the engine performs in terms of power and speed.
  6. Environmental impact
    The engine's noise and emissions levels and how well it complies with environmental regulations.

About this ranking

This is a community-based ranking of the most reliable aircraft engine. We do our best to provide fair voting, but it is not intended to be exhaustive. So if you notice something or engine is missing, feel free to help improve the ranking!


  • 155 votes
  • 10 ranked items

Voting Rules

A participant may cast an up or down vote for each engine once every 24 hours. The rank of each engine is then calculated from the weighted sum of all up and down votes.

More information on most reliable aircraft engine

When it comes to aircraft engines, reliability is absolutely essential. The last thing any airline wants is to have an engine fail mid-flight, putting passengers and crew at risk. That's why aircraft manufacturers invest heavily in developing engines that are not only powerful, but also incredibly reliable. There are many factors that contribute to the reliability of an aircraft engine. One of the most important is the materials used in its construction. Engines made from high-quality materials are less likely to suffer from corrosion, wear, or other forms of damage that can compromise their performance. Another key factor is the design of the engine itself. Engines that are well-designed are more likely to be efficient and reliable, as they are better able to withstand the stresses of flight and operate at peak performance levels. Of course, even the best-engineered engines can still experience problems from time to time. That's why regular maintenance and inspections are so important. By keeping engines in top condition, airlines can minimize the risk of unexpected failures and ensure that their planes are always ready to take to the skies.

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