Sounds like a muffled F1 engine...and the Germans in the background got a kick out of it so u know it's good
We took the brand new Audi R8, an Audi RS4, a BMW M6 and a Porsche Carrera S for a ride. On straight lines the M6 was the fastest, RS4 had the fastest acceleration off the line, the Porsche was the easiest to drive and the R8 had the best handling by far.