Turbofan vs Turbojet: Which Engine Rules the Skies Today?
Published Oct. 7, 2025
Airplanes fly high and fast, but not all engines are the same. When people hear “turbofan vs turbojet,” they wonder, what’s the big difference? These engines may look alike, but they work in very different ways. Some are made for speed, while others focus on saving fuel.
If you’ve also seen “turbojet vs turbofan vs turboprop,” it can feel confusing. Don’t worry, you don’t need to be a pilot to get it. This guide will break it down in clear and simple words, so you can finally know which engine rules the skies today.
What Makes a Turbojet Engine Special?
A turbojet is the oldest jet engine type. It pulls air in, squeezes it, mixes it with fuel, and pushes it out the back at very high speed. This makes the plane go super fast, which is why turbojets are often found in fighter jets. They are small, light, and strong at high speeds.
But there’s a catch. turbojets burn a lot of fuel and are very loud. You might ask: why do we still use them? The answer is speed. When it comes to racing through the skies, a turbojet engine is still a powerful choice.
How a Turbofan Engine Works
Now let’s look at the turbofan. A turbofan is like a turbojet, but with a big fan in the front. Some of the air goes through the hot engine core, while the rest goes around it, called bypass air. This helps make extra push without burning more fuel.
The result? Less noise, better fuel use, and smoother flights. That’s why turbofan engines are used in most airliners today. If you’ve ever flown on a Boeing or Airbus, you’ve been powered by a turbofan. The design is newer, quieter, and built for long trips with passengers.
Cold Air vs Hot Air: The Secret Inside
What makes turbofan vs turbojet engines different on the inside? The turbojet has only a hot section, where all air gets burned for power. But the turbofan has two sections: hot and cold. The cold section lets air pass around the engine like a hidden helper.
This gives thrust without fire or noise. Imagine blowing through a straw (turbojet) versus using a fan (turbofan). One is sharp and strong, while the other spreads out and feels smoother. This cold bypass is the reason why commercial planes sound like a “hum” instead of a fighter jet’s roar.
Fuel and Speed: Who Wins?
When comparing turbojet vs turbofan engines, the fight often comes down to fuel and speed. Turbojets love speed, they work best at supersonic levels. That’s why jets like the Concorde and SR-71 used them. But at slower, everyday flying speeds, they drink fuel too fast.
Turbofans flip the story. They save fuel, making them cheaper to run over long flights. They are not as fast as turbojets, but they are perfect for airlines carrying passengers around the world. The big question is this: do you want raw speed or smart savings?
That choice decides the winner.
Noise and Comfort in the Sky
Have you never heard the squeal of a fighter jet? It is a turbojet, noisy and crisp. Conversely, it makes more of a steady humming sound when you are on a commercial flight. That’s the turbofan’s magic.
The bypass air also mutes the noise, giving the passengers and airports a smoother ride. That is one of the reasons why airlines were able to switch to turbofan engines. A smaller plane will result in fewer noise complaints on the ground and fewer unhappy people on board.
In comfort, therefore, the turbofan obviously dominates the skies compared to the turbojet.
Maintenance and Design Costs
Turbojet is easy to construct and repair because it is not very complex in nature. Turbofans are more complicated, though. Their fan blades are large, and they have nacelles with more moving parts. This implies that they require additional checkups, maintenance, and care.
This is acceptable to airlines since turbofans consume less fuel and produce less noise. However, it is more expensive to construct and repair them. Thus, as the turbofan becomes the hero of commercial travel, it carries larger bills to the airlines.
The turbojet uses fewer parts and costs less to maintain, but is restricted in its usage.
FAQs: Turbofan vs Turbojet
Do airliners use turbofan or turbojet?
Airliners use turbofan engines, not turbojets. Turbofans are quieter, save more fuel, and give smoother rides for long trips. Turbojets are too loud and burn too much fuel for passenger planes. So, when you fly on a Boeing or Airbus, you’re flying with a turbofan, not a turbojet.
Are turbojets still in use today?
Yes, turbojets are still around but in fewer planes. They are mostly found in military fighter jets and some older aircraft. Turbojets are great at very high speeds, which is why the military still uses them. But for most travel, turbofan vs turbojet battles have been won by the turbofan.
Why is turbofan better than turbojet?
A turbofan vs turbojet engine comparison shows that turbofans are better for most uses. They use less fuel, make less noise, and work better at the speeds airliners fly. Turbojets are faster but not efficient at lower speeds.
Is the F-22 a turbofan or turbojet?
The F-22 Raptor uses turbofan engines, not turbojets. Its Pratt & Whitney F119 engines are low-bypass turbofans. This design gives the F-22 both speed and fuel efficiency. It proves that turbofan vs turbojet is not always about one winning, sometimes turbofans can be tuned for fighter jet power too.
Why don’t fighter jets use turbofans?
Actually, many modern fighter jets do use special low-bypass turbofan engines. They give extra thrust while still saving fuel compared to turbojets. Older jets used turbojets for raw speed, but new designs blend both.
Final Thoughts
When we look at turbofan vs turbojet, it is clear both engines have their own place in the sky. Turbojets win in speed and power, which is why they shine in fighter jets. Turbofans are better for airlines because they save fuel, make less noise, and carry people farther.
Each engine plays a role, depending on the mission. Want to explore more about aviation engines, flying, and aircraft technology? At Palm Beach Avionics, we make learning about the skies simple, clear, and exciting for everyone.
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About The Author
Rei Bayucca is a private jet enthusiast and professional writer. With many years of experience, she crafts articles that educate and inform her readers.
