First thing I noticed about my 99 Boxster was how quiet it was inside given it was a soft top. Quieter than some hard topped cars I have owned. So, I think with that, mine is relatively quiet inside. Tires are a big contributor, air pressure. AND road surface. I drive on a gravel road, and then about 3 different paved sections of road that that surfaces are treated differently and the road noise in the cabin is different for every road surface.
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