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Added some creature comfort upgrades to my Tata Altroz i-Turbo

21st March 2025, 16:04 by Deepankar Sadekar

After replacing just one of the three mounts, the improvement in NVH is noticeable.

BHPian CannedShroud recently shared this with other enthusiasts:

Journey Update:

Creature Comfort Upgrades:

Ever since Tata introduced the BS6 Phase 2 cars, I’ve been on the lookout for drop-in parts to improve my Altroz iTurbo’s NVH (Noise, Vibration, and Harshness). While I don’t yearn for an engine so refined that you can’t tell it’s running, a little NVH improvement never hurt anyone. The Phase 2 reviews were quite positive, so I started digging into the potential changes Tata Motors might have made for such gains—shafts, counterbalances, the works. To my surprise, I found nothing concrete.

The Research

Scouring part numbers revealed some intriguing details. The Phase 2 Altroz comes with three mounts—A, B, and C—but their compatibility tables are puzzling:

Mount A: Shared with Phase 2 iTurbo and Racer.
Mount B: Shared with Phase 2 iTurbo and DCA.
Mount C: Shared with Phase 2 iTurbo and Phase 2 NA.

The Fitting Process

As soon as we started fitting the mounts, we hit roadblocks:

Mount B: Despite being the most likely to fit, it didn’t. Two bolt holes attaching to the frame were spaced two inches farther apart than in Phase 1. While some light fabrication work could make it fit, I didn’t want to experiment with engine mounts. My FNG (friendly neighborhood garage) also lacked the expertise for such modifications.
Mount C: This was a complete mismatch. Its shape differed significantly, with the mount holes positioned at almost a 90-degree angle compared to Phase 1.

This mount seemed the least likely to fit, but it worked. It’s heavier and the rubber feels stiffer than the Phase 1 version, which might seem counterproductive for vibration reduction, but it indeed felt better!

Left: Phase 1 mount
Right: Phase 2 mount

Results!

After replacing just one of the three mounts, the improvement in NVH is noticeable. The vibrations haven’t disappeared entirely, and it’s not close to the refinement of, say, a Maruti or Honda 4-cylinder, but it’s significantly better.

Idle, AC on/off, low RPM under light loads, or high RPM under pulls—it’s smoother across the board. And no, it’s not a placebo!

I used a Pixel 7 Pro placed in the cup holder, running an app to measure vibrations for about 30 seconds. While I can’t verify the absolute accuracy, the readings reflect the improvements:

Before (AC On)