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 |
thing to do is to write to EPA on their web site and ask what their regs are
could be an exception for pickups like the subsidies for gas hogs we used to have...