Forgive me if I struggle to describe well what I'm hearing, there's probably terms for what I want to say but I may not know them.
My first thought was that it sounded pretty good. My second thought was that it sounded pretty good, but...something.
It's almost an uncanny valley sort of feeling. There's something not quite right, but it's hard to pin down.
It does sound very, very smooth. Unnaturally smooth, almost. It lacks some of the "sharpness" that I might expect. An engine is explosions at heart, and a race engine especially so. It sounds a little muffled, not in that it's unclear, simply that the sound is, I don't know, blurred slightly? Hard to describe.
I notice it particularly on the blips downshifting. It has a kind of "wow, wow" sort of thing going on, as if there's a big butterfly valve or something in the system that's having trouble opening and closing fast enough to get out of the way when you stab the throttle. It sounds a lot like the sound of the intake on and off throttle is changing mostly by how loud the sound is, and the volume just isn't changing fast enough to keep up with the blips.
I could be wrong, but that's sort of what it sounds like. Hard to tell without your own foot on the throttle, maybe they were just slow and steady blips.
Running that through the spectrogram, I can see clearly the lines of sinewaves that are being added to make the sound.
All games seem to have these sorts of traces to some extent or another, I guess as a side effect of modifying a single sample or building from certain frequencies, but that's a particularly visually obvious example.
