Don't forget they 'pipe' the engine sound directly into the engine compartment in the 718. I was very aware of all that sound when I test drove the 2.0 and 2.5 as part of my research for a future order of a 2019. I can tell you that, for what it is worth, the engine sound in my Cayman R was much more pronounced than my 08 CS similar to what you describe but learned, that it was the nature of the beast.