i think with and without AS the engine sounds the same but a bit higher/louder ... i think this might be an advantage for someone who drives with a high volume stereo ... he will always be aware of the engine sound and rpm regardless of the stereo volume whether high or low ( considering the AS gets louder as the stereo volume increases)
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2007 E90 330i - 272 bhp | 1999 E46 323i - 170 bhp
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