It it prevalent under load or on acceleration. I'm not down on power or anything.

Having owned a B5 Audi A4 for 10 years which uses the same engine as the VRS. I cannot remember the whistle being as loud...

Is this normal? Cheers

See tis thread http://briskoda.net/forums/topic/174875-have-i-got-a-boost-leak/. The only other thing it could be is the alternator or drive belt.

Turbo whistle?

Turbo whistle?

Yup turbo whistle...

Then yes, it is normal

If you start the car and leave it running, then stand by it for about two minutes,

you will hear a high pitched whistle start to sound . If thats the sound you're hearing

then you're probably okay.

If whilst driving along you notice it starts at around 1500-1700 odd rpm.

But notice it less after that when pressing on as the engine gets louder

Then that's almost certainly the turbo spooling up and is quite normal

and part of the Fabia vRS soundtrack...

If you want a louder whistle then get a blueflame cat back or other

aftermarket exhaust it's even more noticeable

with one of those fitted. I love how it sounds

Turbo whistle = perfectly normal.

When it starts to sound like a police siren, then you need to worry!