I've heard the l3 half a V6 thing, youtube Aygo/107/C1 Nurburgring and you can kind of convince yourself of the V6 thing!
a lot of the characteristics of an engine note are from the exhaust manifold, for example a Subaru Impreza sounds very very different as 2 of the exhaust pipes from the engine are a lot shorter than the other 2 giving a very distinctive burble (some say that sounds like half a V8...)
Lopez, I've always wondered. Why do you have a picture of masjid al-nabwai in your signature? I'm sure I've asked you this before.