I know I'm going to get mocked for this, but I'll tell you all anyway.

A couple of years back, I was biking home from work and I heard the best sounding road car ever turn the corner below and start climbing the hill towards me.
Perfectly pitched turbo whistle that drowned out the engine, with a muted waffle of the blow-off valve at each gear change.

2 seconds later I was passed by a honda city turbo II.