i have a similar problem,i have 2Mbps , getting between 160-180 kB/sec on private torrent,normally get between 220-240, torrent is well seeded .
on the other hand getting 240 kB/sec on direct downloads.
has Airtel finally started traffic shaping with regard to P2P ?
If you are getting 220 or 250 speed when downloading then its normal. Downloading speed = actual divided by 8. If torrent shows approx 220 as downloading speed then its normal.