Just to add to this, 140dB isn't about twice as loud as 80dB as the units might lead you to believe, since the scale is logarithmic: http://en.m.wikipedia.org/wiki/Decibel
These FE cars are MUCH quieter than their F1 cousins.
These FE cars are MUCH quieter than their F1 cousins.
From http://trace.wisc.edu/docs/2004-About-dB/
So it's really 2^6 = 64x as loud, perceptually.