Answering your vehicle-related queries – The Hindu

Shifting on from the Innova Crysta

Rahul Vikas, Bengaluru: I’m seeking to improve from my 2017 Toyota Innova Crysta and have shortlisted the BMW X5 and the Mercedes-Benz GLE 400d. My utilization is on damaged roads and lengthy-distance journeys, so a mushy suspension and comfy seats are a precedence. Which of those greatest match my invoice?

The X5 is a nicer automobile to drive. Nonetheless, on unhealthy roads, the GLE has a greater experience and absorbs damaged roads higher. The 400d engine can be clean and has enough punch to make driving a pleasure.

A query of engines

Eswar, Hyderabad: If a 1.0-litre turbo engine gives extra mileage and efficiency, then why use a 1.2-litre petrol engine? What are the professionals and cons of each?

The distinction between a 1.0-litre turbo-petrol and 1.2-litre naturally aspirated petrol engine is the previous tends to be a 3-cylinder unit, whereas the latter normally includes 4 cylinders. A 3-cylinder engine produces unbalanced vibrations because of the reciprocatory motion of two pistons in the identical path, whereas that will get balanced out in a 4-cylinder engine.

So, in actual-world situations, a 1.0-litre engine would really feel extra noisy, jerky and sluggish in its energy supply at decrease RPMs, and in addition filter some vibrations into the cabin or clutch pedal. To counter the vibrations, carmakers typically use a balancer shaft and in addition equip the engine with a turbocharger to enhance low-finish torque and throttle response, which is additional improved by an computerized transmission. Alternatively, a 1.2-litre engine would really feel considerably smoother at idle and off the road, thus permitting for higher in-metropolis driveability and regularly constructing tempo thereafter.

Now coming to the gas effectivity, regardless that three-cylinder engines are lighter, and a turbocharger minimises the airpumping losses contained in the engine, the true-world figures rely so much on the driving fashion. Because the meat of the powerband in turbocharged engines lies at larger RPMs, it’s robust to acquire constantly excessive economic system figures if one desires to extract the utmost efficiency. As compared, a 1.2-litre naturally-aspirated engine would find yourself consuming much less gas for the same drive expertise.

In a nutshell, A 1.0-litre turbo-petrol engine might be appropriate for a driving fashion aimed toward extracting most efficiency from the car, whereas a 1.2-litre is for a relaxed and comfy every day commute, with occasional enjoyable at excessive revs.

Hormazd Sorabjee is the editor of Autocar India. Mail your suggestions and queries to roadshow@thehindu.co.in

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