Last Updated on September 20, 2023 by Victor A

In the ever-evolving world of automotive engineering, few components have had as profound an impact as the turbocharger. 

These compact devices are at the heart of many high-performance vehicles, revolutionizing the way we think about engine power and efficiency. 

In this blog post, we’ll take a deep dive into the fascinating world of turbos, exploring their inner workings, benefits, and why they’ve become a staple in the automotive industry.

What is a turbo? The Basics of Turbocharging

Before we delve into the intricacies of turbochargers, let’s start with the fundamentals. 

At its core, a turbocharger is an ingenious device designed to increase an engine’s power output by forcing more air into the combustion chamber.

This process, known as forced induction, allows an engine to burn more fuel and air, resulting in a significant boost in horsepower and torque.

Here’s a simplified breakdown of how it works:

  1. Exhaust Gas Energy: The turbocharger harnesses the energy from the engine’s exhaust gases. As exhaust gas exits the engine, it flows through the turbine side of the turbocharger.
  2. Turbine Spinning: The exhaust gases cause the turbine wheel to spin. This spinning motion is where the magic begins. It’s this kinetic energy that powers the entire turbocharging process.
  3. Compressor Action: Connected to the same shaft as the turbine wheel is a compressor wheel. As the turbine wheel spins, it forces the compressor wheel to spin as well. This compressor wheel draws in ambient air and compresses it before delivering it to the engine’s intake manifold.
  4. Increased Air Density: By compressing the incoming air, the turbocharger effectively increases its density. This denser air contains more oxygen, which is crucial for combustion. When mixed with the appropriate amount of fuel, it results in a more potent explosion in the engine’s cylinders.
  5. Power Boost: The increased oxygen content allows the engine to burn more fuel, generating more power. This is what makes turbocharged engines significantly more potent than their naturally aspirated counterparts.
Turbocharger in a car

What Does the Turbo Do in a Car? Benefits of Turbocharging

Now that we have a grasp of the turbocharger’s mechanics, let’s explore why this technology has become so prevalent in the automotive world. 

There are several key advantages to turbocharging:

  1. Increased Power: The most obvious benefit of turbocharging is the power boost. Smaller engines equipped with turbochargers can produce power levels comparable to larger, naturally aspirated engines. This means you can have a compact and fuel-efficient engine without sacrificing performance.
  2. Improved Fuel Efficiency: Surprisingly, turbochargers can enhance fuel efficiency when used strategically. By downsizing the engine and using a turbo to compensate for the loss in displacement, automakers can achieve impressive fuel economy figures without sacrificing power.
  3. Reduced Emissions: Turbocharged engines often produce fewer emissions compared to larger, naturally aspirated engines with similar power outputs. This is due to the efficient combustion facilitated by the denser air provided by the turbocharger.
  4. Torque On-Demand: Turbochargers are known for their ability to deliver torque at low RPMs, providing excellent low-end power. This translates to responsive acceleration, making the driving experience more enjoyable.
  5. Versatility: Turbochargers are incredibly versatile and can be adapted to various engine configurations. Whether it’s a small four-cylinder or a monstrous V8, turbos can be tailored to suit the specific needs of the engine.

Turbocharged Myths and Misconceptions

While turbocharging offers a plethora of benefits, there are some myths and misconceptions that have persisted over the years. 

Let’s debunk a few of them:

Myth 1 – Huge Amounts of Turbo Lag

One of the most common misconceptions about turbochargers is the existence of lots of “turbo lag.” 

Turbo lag refers to the delay between pressing the accelerator and feeling a surge of power. 

While this was a legitimate concern in older turbocharged vehicles, modern engineering has largely mitigated this issue.

Advancements like twin-scroll turbos, variable geometry turbines, and electronic boost control systems have made turbo lag nearly imperceptible in many cars. 

In fact, some modern turbocharged engines provide power with such immediacy that it rivals or even surpasses naturally aspirated engines.

Myth 2 – Reduced Reliability

Another myth is that turbocharged engines are less reliable than their naturally aspirated counterparts. 

While it’s true that turbochargers add complexity to the engine, modern engineering, and materials have significantly improved their durability. 

Regular maintenance and responsible driving habits can help ensure the longevity of a turbocharged engine.

Myth 3 – Premium Fuel Requirement

There’s a common belief that all turbocharged engines require premium-grade fuel. 

While it’s true that some high-performance turbocharged engines benefit from premium fuel to maximize power, many modern turbocharged vehicles are designed to run efficiently on regular unleaded gasoline. 

It’s essential to consult your owner’s manual to determine the fuel requirements of your specific vehicle.

The Future of Turbocharging

As automotive technology continues to evolve, the future of turbocharging looks promising. 

Manufacturers are pushing the boundaries of what’s possible with forced induction. Here are some trends to keep an eye on:

Electrified Turbos

One exciting development is the integration of electrified components into turbocharging systems. 

Electric turbos, also known as e-turbos or electric superchargers, can provide instantaneous boost at low RPMs, eliminating turbo lag entirely. 

These systems often work in tandem with hybrid powertrains, further enhancing efficiency and performance.

Variable Geometry Turbines

Variable geometry turbines (VGTs) have been around for some time, but their refinement and widespread adoption are on the horizon. 

VGTs can optimize airflow at different engine speeds, delivering consistent power throughout the RPM range. 

This technology contributes to both power and efficiency gains.

Smaller Displacement Engines

To meet increasingly stringent emissions regulations, manufacturers are downsizing engines and employing smaller, more efficient turbochargers. 

These downsized powerplants are often part of a hybrid or electrified powertrain, combining the benefits of turbocharging with electric propulsion for a winning combination of power and efficiency.


In conclusion, the turbocharger is a remarkable piece of engineering that has transformed the automotive landscape. 

It provides a substantial power boost, enhances fuel efficiency, and reduces emissions, all while challenging misconceptions about reliability and responsiveness.

As we look to the future, turbocharging will continue to play a pivotal role in the automotive industry. 

With innovations like electrified turbos and variable geometry turbines on the horizon, we can expect even more exciting developments in the world of forced induction. 

Turbocharging has come a long way since its inception, and its journey is far from over.

So, the next time you hear the question, “What does the turbo do in a car?” you’ll have a comprehensive answer that goes beyond the basics and into the exciting realm of modern turbocharging technology. 

The turbocharger is indeed the beating heart of many high-performance engines, and its influence on the automotive world shows no signs of waning.



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