M37S 2011 vs Q70S 2015 road noice / sound insulation

[Charlie2011]

Does the Q70S 2015 is quiter than before models??
Does the infiniti engineers have add noice isulation materials, Increased the sealing, etc. resulting in a reduction of road noice and in a quieter car?
Any difference in the suspension between Q70s 2015 and previous models?

[Larz]

I don't know if there is an accurate answer for that. The Q70 was not a re-design so much as a cosmetic refresh. I suspect that since they both share the same interior, they probably did not add anything significant. I reckon the noise level is about the same in both, but that is a 100% guess. I read an article stating that the 2018 Q70 will be a complete re-design, but the guys at my dealer say they haven't head anything to confirm that.

[tlaspec]

I read about the addition of sealing in the press release for the 2015 Q70. I checked out the Q70 at my local car show and just by poking around the car I noticed that there is an additional rubber strip on the rear doors.

Keep in mind though that noise level is subjective to each person. I find my 2011 to be noisy over certain pavements and a little too much wind noise depending on the wind direction. However, I had people riding in my car complimenting on how quiet it is.

One thing that will dramatically reduce road noise is new tires.