The sound of the V12 engine from BMW in McLaren F1 is really amazing, and the racing GTR version is even more extreme, and louder.
The McLaren F1 was, but it still is one of the best super sports cars, which held the speed record, until the Bugatti Veyron model appeared.
The racing version, the model GTR, which in the middle 90s was without competition. This car is the Longail version from 1997 and the engine is a 6.0 V12 from BMW.
You can see and hear how loud this car is by the reaction of the old lady that jumped by the roar of this V12 beast.