Twin-turbo, also known as Bi-turbo, is the name given to supercharged engines equipped with two turbochargers.

The two turbochargers operate either in a parallel configuration (jointly) or a sequential configuration (separately).

Turbo, Twin turbo, Bi-turbo, Twin-scroll, or electric turbo? Which one is the best, and what are their advantages and disadvantages?

We will look at all the mentioned types of turbochargers in this article and talk about their construction.

Turbochargers are popular for boosting an engine's power without increasing size or weight. Turbocharged engines are replacing naturally aspirated ones since even smaller engines are able to put out more horsepower and torque.

However, putting the increased power and other benefits aside, turbocharged engines are often associated with the word turbo lag.

A turbocharger, or "turbo" in short, is a device that increases the power of an internal combustion engine by forcing air into the combustion chamber.

The increase in power comes from the engine receiving many more oxygen molecules from the same air volume. Since the air is pressurized, the mixture is more explosive, the engine thus accelerates more easily, and it does not need more fuel.