Re the noise, I read that T8s (at least those with a sub, so B&W or HK audio) in recent model years have augmented engine sound via the audio system. I would agree that our MY21.5 (with HK) is a lot growlier and basey than our MY18.5 was (which interestingly had the standard audio
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For info, I did a MY18.5 to MY21.5 comparison last year
https://www.volvoforums.org.uk/showthread.php?t=315136
D76