My 5-way tie:

*The sound of a new Enzo being run to redline in 1st, 2nd and third. (Driving, behind the car)

* The sound of an F355 in one of the many tunnels between Italy and Switzerland (Following directly behind the car at the time)

* The sound of a MkIV TT Supra w/ ±550whp. (From the passenger's seat, targa roof open)

* The sound of a 993 911 Turbo passing at 180+ on the Autobahn between Ülm and Frankfurt. (In a 406 V6 Sedan at about 110mph)

* The sound of a 1989 Peugeot 405 Mi16 from 2500 rpm on to the 7400 rpm fuel-cut. (From the driver's seat h: )