Well, I have just conducted a very un-scientific study on the cabin noise levels in the Passat. I downloaded a cool free decibel reader app on my Ipad. I compared the decibel readings from my Passat and my Civic at 40, 50, 60, and 70 mph and here are the results.
MPH Passat Civic
40 68db 72db
50 70db 78db
60 71db 74db
70 73db 78db
peak db 86 95
My only explaniation of why the civic went down at 60mph is that at 50mph there seemed to be a lot of road noise, then at 60 it quieted down and then the wind noise took over at 70.
Both cars were taken on the same route with the same speeds in the same part of the road.
The peak decibel reading were on a rough surface of the road.
The Passat has the continental tires.
Conclusion, The Passat with the continental tires is very quiet and as the speed increases the elevated noise levels come from wind noise and still remains relatively quiet. The Honda is a soup can on wheels. lol
VW's from my past.
1986 Scirocco 16v, 1998 Jetta GLX Vr6, 2002 Passat 1.8t, 2005 Passat 1.8t, 2009 Passat 2.0t.
Last edited by ixlr08; 07-26-2012 at 02:31 PM. Reason: spelling
02 TDI Golf 5M- Black w/Black- RC3+ , PP520, VNT-17, Webasto, 262K miles, 58mpg
12 TDI Passat SE 6M- Platinum Gray w/Moonrock- 52 mpg
I would make a bet it's the tires, there have been threads before and if you look at tire rack the rating for the Hank. tires are very low for noise.... (meaning bad).
I wish I would have know before I did buy, but on the road tests, it seem much more quite than the GLI I compared it too... I might call VW just to make a comment and see what happens, but I will probably switch out to contis or good year asymetrics when I get a chance.
And the observations are true, on some surfaces the Hank. tires are fine, but switch to concrete and it's noisy.
I did a little informal test this morning to measure road noise. Using my sound level meter (weighted to A) I measured road noise at 60 mph, windows up, climate control off, radio off, hand held and pointing slightly upward about 18" from the radio. Rough pavement hovered around 72 dba, fresh asphalt sections of road dropped 10 dba to 60-62 dba. I want to perform the same rest in my Q7 to compare as I have never felt it was loud.
Current: 2012 Passat TDI SEL / 2012 Touareg TDI Lux
Past VW: 2005 Touareg 3.2 / 1996 GTI-VR6
Past Other: 2007 Audi Q7 4.2 / 2007 BMW 328xi / 2006 Porsche Cayenne / 2003 Audi A6 3.0Q / 2001 Audi A4 2.8Q / 1998 Jeep Wrangler Sahara / 1991 Honda Accord EX / 1989 Toyota Supra
Using three different iPad sound level apps and averaging, our month old Passat (with the Contis) measures 60-62 db (A weight) on brand new freeway asphalt, jumps up 7 db on older but still decent freeway.
There is a stretch of road I want to test on that is really bad pavement.