So, now the question is which is better, turbocharger or supercharger? From a practical perspective, turbochargers are the way to go. They deliver a perfect blend of power and fuel efficiency, which most car buyers are looking for. Hence, car manufacturers use turbochargers in most modern cars.
On the other hand, superchargers are for outright power that comes at the cost of low fuel efficiency. They are best suited for high-end sports cars with high capacity engines. In the world of performance/sports cars, fuel efficiency is thrown out of the window. Hence, superchargers find a perfect home under the bonnet of such vehicles.
What is a turbo-petrol engine?
A turbo-petrol engine is nothing but a petrol internal combustion engine that is fitted with a turbocharger. One of the main highlights of such engines is they are powerful and efficient than larger capacity naturally aspirated petrol engines.
The turbocharger can draw more air and compress it before it reaches the cylinders. It makes a smaller petrol engine behave like a high capacity engine due to the more powerful combustion. Hence, a smaller turbo-petrol engine can produce the same/more power than a high capacity NA petrol engine.
What is a turbocharged diesel engine?
A turbocharged diesel or turbo-diesel is an internal combustion engine with a turbocharger assisting in providing compressed air for better combustion. The more efficient the combustion of fuel, the more efficient and powerful the engine.
Hence, turbo-diesel engines produce more power and are also fuel-efficient at the same time. Turbochargers also help in generating a superior torque curve as compared to a naturally aspirated diesel engine.
Turbo engine oil and its usage
Engine oil in a turbocharged engine is also used to lubricate and cool the turbo. Yes, a turbo operates at very high RPMs and high temperatures. Without lubrication, the turbo could break down due to the high temperature and forces. Hence, the oil is fed to the turbocharger, and it acts as a lubricant and coolant.
Lack of oil or any issues with oil supply lines can cause irreparable damage to the turbo. Similarly, any impurities in the engine oil can also damage the turbocharger components. So, one has to pay attention to the engine oil level and the quality of the oil to keep the engine and turbo in perfect condition.
Also, read: What is RPM in cars?
What is a twin-turbo engine, and how is it different?
A twin-turbo engine is a car engine with two turbochargers. The basic working of a turbocharger remains the same except that two of them are working simultaneously to deliver compressed air into the combustion chamber. Twin-turbo engines produce almost double the power of naturally aspirated engines. You can find such setups in high performance or modified cars.
The below points explains more details about a twin-turbo setup in an engine.
There are mainly two types of twin-turbocharged engines based on the configuration: sequential and parallel twin-turbo engines.
In a sequential setup, there are two turbochargers of different sizes.
The smaller turbo is responsible for providing a boost at lower RPMs, while the larger turbo works at higher RPMs.
In a sequential twin-turbo engine, one can experience more power lower down the rev range.
In a parallel twin-turbo engine, both the turbos are of the same size and operate simultaneously.
Both the turbos perform equally by splitting the cylinders. For example, in a V6 engine, each turbocharger is responsible for three cylinders.
In a parallel twin-turbo engine, there is considerably less turbo lag due to two turbos working simultaneously.
What is turbo lag, and how do you get rid of it?
Turbo lag is a slight delay in response after you press the accelerator pedal. It happens because the engine is not producing enough exhaust gas to spin the turbo's turbine wheel fast enough.
You experience turbo lag only when you drive aggressively or suddenly accelerate from a closed throttle position. So, turbo lag is not a big issue in a modern car, at least for everyday drivers.
Car manufacturers eliminate turbo lag by fitting two turbocharges to the engine. That's the reason why twin-turbo engines are generally free from turbo lag. Another way to get rid of turbo lag is by using a supercharger. Since the engine power drives a supercharger, there is no lag in boost.
Tips to make turbo cars more efficient
A turbocharged engine is not all about power. Fuel efficiency also matters. So, here are a few tips to enhance the fuel efficiency of a turbo car.
Always maintain a low and constant speed while driving your turbocharged car. Drive at a comfortable cruising speed and constantly maintain that speed. An engine running at a constant and optimum RPM returns better fuel economy.
Shift the gears early to a higher gear. Turbo engines produce more torque lower down the rev range. Hence, the more the RPM at lower gears, the more the fuel consumption. So, shifting to a higher gear as quickly as possible will help improve fuel efficiency.
Learn to lift and coast while driving your turbo car. It’s nothing but getting off the throttle and allowing the vehicle to roll. The engine braking will slow down the car. You can apply this technique while stopping at a traffic light. But make sure that you anticipate the traffic before lifting and coasting.
You may use high-quality fuel or premium fuel in your turbocharged car to extract the best fuel economy. High-quality fuel results in efficient combustion, and hence the engine may return better mileage.
Maintain the correct tyre pressure as recommended by the car manufacturer. Tyre pressure is often overlooked, but it impacts fuel efficiency. So ensure that you maintain the optimum tyre pressure in your car.
What should you not do with a turbo engine?
Turbo engines are powerful and efficient. However, the efficiency depends on how you drive your car. The below points explain what not to do while driving a turbo engine-powered car.
Never turn on the engine and drive straight away. Always warm up the engine before you drive. Warming up allows the engine oil to come to an optimal operating temperature. A well-lubricated engine and turbo are essential for the efficient functioning of the engine.
Do not shut down the engine immediately after you push the engine to its limits or drive aggressively. Allow some time (a few minutes) to cool down the essential fluids and then swift off the engine.
Avoid lugging the engine by driving at a slower speed in higher gears. It puts a lot of stress on the engine components.
Do not step on the throttle aggressively if there is a turbo lag. If you accelerate suddenly, the turbo will take a few seconds to spool up. But when it spools up, the sudden surge of power may catch you off guard, and you may lose control of the vehicle.
Never use lower octane fuel in a turbocharged engine. Refer to the owners manual and use the correct octane level fuel.
Also, read: Car Engine Types
List of best turbo engine cars in India
Here’s the list of best turbo engine cars available in India.
Turbo-diesel engine cars in India
Below are the turbo-diesel engine cars available in India.
