The Advent of Small Turbo Petrol

October 9, 2023
Off late we are witnessing the advent of small capacity but highly potent internal combustion petrol engines with generous help from turbo charging.

The Rise of Small Turbocharged Petrol Engines

Till a few years back forced induction with the help of turbo chargers was confined to diesel engines due to their inherent lack of horsepower vis-a-vis a similar capacity petrol counterpart. Thankfully turbo charging has trickled down to small petrol engines and what we have now is engines producing as much power and torque as engines 1.5 times their capacity.

What that translates to is - a one litre turbo charged engine is producing power and torque figures similar to a 1.5 litre naturally aspirated motor.

Balancing Enthusiasm and Environmental Concerns

It is an interesting development which juxtaposes the appeasement of enthusiasts and the environment to a certain extent. Although appeasement of environment is not as much as in the case of electric engines, but as cliched as it may sound 'something is better than nothing'.

It kind of gives you the best of both worlds. Petrolheads (or Petrosapiens as I prefer to call my ilk) can satiate their hunger for exciting performance, screeching of tyres with dollops of torque and horsepower at their disposal with a heavy right foot. When driven with a lighter foot they also stretch the kilometres per litre equation akin to small capacity engines. Hence, mileage seekers' needs also checked. So, sounds like a winning formula, ain't it?

The Challenge of Odd-Cylinder Engines

Yes, indeed it is. But it’s not all as rosy as it sounds. What's disheartening is the choice of odd number of cylinders (i.e. 3) almost all manufacturers are going with and in certain cases it's without a balancer shaft. Yes most of them are very refined and at certain rpms the three cylinder thrum is almost imperceptible, but the key words here are 'certain rpms'. At rpms, other than those 'certain rpms' the typical three cylinder thrum is definitely present. I need not tell a car enthusiast worth his/her salt that - he/she will not be able to keep the engine at those imperceptible rpms all the time.

The thing is how much ever refined you might make a three cylinder unit it can never match a four cylinder's refinement. There's a symphony which only an even numbered unit can produce and an odd numbered unit can only dream of. Distantly. You can't defy the laws of physics, can you? Yes, you can if you are Rajnikanth. Sorry for the crass joke my Tamil readers.

Why Three Cylinders Over Four?

So, why three cylinders instead of four? Is it impossible to produce a small one litre engine with four cylinders? Hell, No. The Kawasaki ZX-25R is proof. Ok, its a bike but with a 0.25 litre engine comprising 4 cylinders. The Santro's 1.1 litre Epsilon engine was a 4 pot unit albeit naturally aspirated.

Is it costs? Is developing and producing a small 1 litre 4 cylinder unit an expensive proposition? Well, I would leave that question for my readers who are qualified mechanical engineers to answer.

For the manufacturers my question is - why wasn't turbo charging their existing 1.2 litre 4 cylinder naturally aspirated engines considered over developing all new 3 pot engines?

After all the symphony produced by the orchestra of 4 cylinders is also as important as the performance of the engine. From the crescendo at the redline to the diminuendo at idle and then back again to the crescendo. Its music to the ears. Ask an automotive aficionado!

Shared by, 
Zeeshan Dawood | Auto Enthusiast

Disclaimer: Information is submitted by the owner of the vehicle through online form medium. Volklub-Sunderdeep Singh doesn't take any responsibility to confirm accuracy or authenticity of the information provided. Readers are requested to make their opinion by reading from other means as well and do take a test drive of the car you are interested in and ask all doubts from the authentic service/sales advisors in a particular brand.

Sole purpose of this review is to try providing readers with factual information where other readers have shared their ownership experiences that may help readers for their car buying decision.

About the author, Sunderdeep Singh

Greetings, fellow car enthusiasts! I'm a dedicated WordPress Developer and Lead Generation expert, proudly steering the ship at Prinspire Technologies. On Upwork, our agency stands tall with a Top-Rated status, backed by the trust of over 200 satisfied clients and a remarkable 80,000 billed hours.

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