Quote:
Originally Posted by jyl
I see that European regulations are 74 dB for cars, 80 dB for commercial vehicles. Diesel cars there are less than 1 dB louder than petrol cars. There are, of course, a lot of diesel cars in Europe, and many of those are mass-market cars at affordable prices.
So obviously it is possible to make a reasonably quiet diesel light vehicle motor, at a reasonable cost. Is there some reason why US diesel pickups can't be quiet(er)?
Comparative analysis of noise emissions of new European passenger cars | Efthimios Zervas - Academia.edu |
You are wrongly assuming that the motors used in the Diesel pickups are light duty engines... They aren't. For example, both the 5.9 cummins and the Powerstroke are used in 2ton trucks. They aren't anywhere near the same as the little 1.8L VW and Merc diesels. A 3/4ton or 1ton is not a light duty vehicle IMHO.