IAB Report – Tata Motors preparing a Revotron-like technology for diesel engines

Posted on: Jul 9, 2014 - 8:18pm IST

Revotron is a breakthrough technology as it is the first instance that Tata Motors, or any Indian OEM, has developed a turbo gasoline engine that offers features like multiple driving modes. Since it is turbocharged, the bandwidth of application can start with the B Segment and stretch up till the C+ Segment counting on different software maps.

Tata Revotron engine front
The 1.2L Revotron is the first turbocharged petrol engine from an Indian OEM.

However in a market where diesel engines dominate, relying solely on Fiat’s 1.3-liter Multijet engine could chain up the company as products beyond the B segment which don’t comply with the sub-4m rule, use larger engines that deliver higher power and torque while still returning excellent fuel efficiency. If Tata were to build a mid-size sedan or a three-row MPV, a 1.5- or a 1.6-liter engine would sit well with a prospective Hyundai Verna or Honda Mobilio customer, who arguably 8/10 times upgrades from a Maruti product which employed the 1.3L Fiat engine.

Tata has not assigned the 1.4-liter CR4 diesel engine for its more recent products (Vista, Manza, Bolt and Zest). The reliability, refinement and its well-earned reputation of ‘India’s national diesel engine’, somewhat justify the partiality towards the Fiat engine.

This one-engine-fits-all situation will backfire in the future when Tata decides to go after the big car segments. So is the engineering team working up a Revotron for its diesel engines?

2013 Tata Indica eV2 engine
Tata’s in-house CR4 engine is ditched for the 1.3L Fiat diesel engine on modern cars like the Bolt and Zest.

Girish Wagh, senior vice president for program planning and project management at Tata Motors spoke to IAB about this on the sidelines of the launch of the Revotron Labs.

He said –

We work on the product portfolio separately and the powertrain portfolio separately. We laid out our product portfolio for 10 years and to be competitive in those segments we have also laid out our powertrain portfolio. In the portfolio, we will have gasoline and diesel, and today you know diesel is a key part and it will continue to be that way, and we will have some new action on diesel as well.

Tata Nexon Concept profile at Geneva
All of the Nexon’s competitors will have engines that displace at least 1.5 liters.

Wagh won’t speak of a time frame for the homegrown diesel engine’s introduction, but we understand that all products starting with the Zest can be beneficiaries of the new generation diesel engine. The company has said it will launch two new passenger models every year starting from 2014. While the Bolt and the Zest are coming this festive season, a smaller pair of cars (codenamed Kite) slotting below the Bolt, are reportedly on the wings next year.

For the year 2016, the company announced that it will launch the Nexon, a compact SUV that challenges the Ford EcoSport and Renault Duster.

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3 thoughts on “IAB Report – Tata Motors preparing a Revotron-like technology for diesel engines

  1. vasu says:

    Hi Nayak you have done a good research. Hope Tata would listen your words.

    All the best Tata.

  2. Dr. Nayak says:

    My wish list for Tata motor’s diesel engine:
    1) Horizontally opposed multi block engine with electrically operated viscoelastic coupling between blocks. This allows high horsepower engine working like 600 cc. engine when power is not required. Also significantly reduces number of moving parts (up to 30%). This type of engine is at least 25 to 40% more fuel efficient compared to the regular architecture.
    2) Low noise and vibration with electromagnetic engine dampening/ mountings
    3) Low velocity wide area mist injectors VS high velocity high pressure CRDI injectors (increase fuel efficiency by 15 to 20%)
    4) Electronically generated noise cancelling speakers inside the engine compartment to cancel out harsh engine noise at low speeds.
    5) And of course start/stop system (micro hybrid system in terms of Mahindra jargon)

    These options are not expensive and can be managed at Indian prices provided Tata develops them in-house (some of them are less than 1000 Indian rupees compared to the current option).

    1. Bhargava says:

      Dear Dr. Nayak, those suggestions are quiet interesting. Thank you for taking the time to mention them here. I will try to forward your suggestions to Tata Motors through Twitter and/or e-mail.


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Shrawan Raja

I'm Shrawan, the Founder & CEO of IndianAutosBlog.com. I love teamwork and talking about cars.