BMW M5 Twin-Turbo V8
If there is one performance saloon that has been showing the others how its done for the last couple of decades it has to be the BMW M5. Through its various incarnations over the years it has offered blistering pace combined with modern day luxuries. A true wolf in sheeps clothing if there was one. I personally have a soft spot for M5 and if there is one thing that differentiates the M series cars from their standard counterparts. It has to be the exhaust. You might want to turn the volume on your computer up for this one..