Loud? Loud, you say? Compared to what? A jet aircraft? A hammer mill? A teenagers car stereo? By comparison to those, my Jeep is whisper quiet.
But compared to any reasonable car, it's noisy. I still have carpets and stock exhaust. I've tried to keep it quiet but it's a no go. Everything makes noise. The tires, the soft top, general rattles, wind noise, traffic, rain. You name it, it's noisy. At least the drive train and exhaust is quiet. I'm glad it is not my daily driver.
So, I take the only defense. Ear buds for my iPod and Sirius sat radio or ear plugs. This is good just for the general health of your ears. But, once on the trail, it's OK and I am happy.