I have recently bought an A4 1.8T Quattro Sport, 2001 with 111,000 miles. I must say it feels a bit sluggish off the mark. Also to me the turbo seems to make an odd sound compared to other turbo petrol cars I have driven. My last one was a 2001 Octavia vRS and it felt considerably quicker and did not have the same unusual sounding turbo. The A4 has recently been in to local Audi dealer for a 'Health Check' and no comment was made on the performance or the noise that the turbo makes. Can anyone shed any light on this??