Explaining the Differences Between Intercoolers and Radiators

These car parts both help cool down an engine, but how are they different?

Co-authored by Devin McSween

Last Updated: March 13, 2023 References

Differences Between Intercoolers and Radiators

|

What is an intercooler?

|

What is a radiator?

|

Do intercoolers increase horsepower?

|

Are intercoolers placed in front of or behind the radiator?

If you’re shopping for a new car or modifying an old one, you’ve probably heard the words radiator and intercooler thrown around. Both of these parts cool off a car’s engine, so are they really that different? If you’re wondering about the purpose of intercoolers and radiators, you’ve come to the right place! In this article, we’ll go over the main differences between intercoolers and radiators and explain what each one does. Read on to learn more!

Things You Should Know

Intercoolers are used to cool down compressed air, while radiators cool off coolant.
Every car has a radiator, while only cars with a turbocharger or supercharger have an intercooler.
Intercoolers use water or air to cool down hot, compressed air and increase the efficiency of the engine.
Radiators absorb the heat from hot coolant using their fins. They then send the cooled-down coolant back through the engine.

Section 1 of 5:

Differences Between Intercoolers and Radiators

1
Intercoolers cool air, while radiators cool down coolant. The major difference between these 2 heat exchangers is what they cool off in your car. An intercooler takes in the hot, compressed air coming from a turbo or supercharger and turns it into more efficient, cool air.^{[1]
X
Research source} On the other hand, your car’s radiator receives hot liquid, called coolant, from the engine, passes it through its vents to decrease the coolant’s temperature, and cycles it back through the engine.^{[2]
X
Research source}
2
Only cars with turbochargers and superchargers have intercoolers. Some high-performance cars have turbochargers or superchargers, which are special parts that push compressed air into the engine. These parts generate a lot of heat, so an intercooler is installed specifically to cool down the hot air they create. Regular cars don’t need intercoolers because they don’t have turbochargers and superchargers.^{[3]
X
Research source}
- The dense, compressed air that turbochargers and superchargers create gives a vehicle’s engine more power and torque.^{[4]
  X
  Research source}
Advertisement
3
A car can just have a radiator, but it can’t only have an intercooler. Because all cars have radiators to cool down, you won’t find an intercooler without a radiator. The intercooler works with the radiator to keep the engine from overheating. In a car without a supercharger or turbocharger, the engine only needs a radiator to cool off.^{[5]
X
Research source}
4
Intercoolers tend to be more expensive than radiators. An intercooler is more of a specialty car part because it’s only used with a turbocharger or supercharger. So, it can cost up to twice as much as a radiator.^{[6]
X
Research source}
- The average intercooler replacement costs around $700.^{[7]
  X
  Research source} The price of a radiator largely depends on your car, but it typically ranges from $700-1,000 to replace.^{[8]
  X
  Research source}

Section 2 of 5:

What is an intercooler?

An intercooler is a heat exchanger that cools down hot, compressed air. The hot air coming from a car’s turbocharger or supercharger is pushed into the intercooler. The air flows through the intercooler, cooling it down and making it more efficient for the engine. Once it's cooled down, the intercooler sends the air back to the engine. Intercoolers come in 2 different types that work in different ways:^{[9]
X
Research source}
- Air-to-Air intercooler: this type is typically more common. The air from the turbocharger or supercharger flows into the intercooler. Then, air from outside your car flows across the intercooler to decrease the compressed air’s temperature.
- Air-to-Water intercooler: this intercooler uses water instead of air. Coolant cycles through the intercooler as the compressed air enters, which reduces its temperature.

Section 3 of 5:

What is a radiator?

A radiator is a key part of your car’s cooling system. Your car’s engine heats up as you drive, which is why coolant flows through the engine to keep it cool. However, the coolant eventually warms up too. When the coolant gets too hot, it gets sent to the radiator. The coolant runs through the fins of the radiator, which absorbs the heat. When the coolant is cool, the radiator sends it back into the engine.^{[10]
X
Research source}

Section 4 of 5:

Do intercoolers increase horsepower?

Yes, intercoolers help increase your car’s horsepower. When intercoolers cool down the hot air they receive from a turbocharger or supercharger, they send it to the engine. The cooler air circulates through the engine, allowing it to work harder and more efficiently.^{[11]
X
Research source}

Section 5 of 5:

Are intercoolers placed in front of or behind the radiator?

Typically, the intercooler is installed in front of the radiator. If you’re adding an intercooler to your turbocharged or supercharged vehicle, place it in front of your radiator. This gives the intercooler plenty of space to get lots of ambient air from outside of your car and cool down the compressed air.^{[12]
X
Research source}
- If space is an issue, other common placements are on top of the engine or inside the side grill at the front of your car.^{[13]
  X
  Research source}