I got really bored and just started watching classic Le Mans races which then led me to the 787B. Then on to Sauber C9, to Formula 1 and so forth. I've spent the latter of 3 hours just watching race cars. So why not start a thread of your personal favorite aural orgasms of engine noise. Lets catalog all engine types for inline-4 (turbo/non-turbo) to wailing V12's (or even V16's )
I'll like to post my t all time favorite.
1995 Ferrari 412 T2 3.0L V12
1991 Mazda 767B/787B