The only thing that ever overtook me on Haldon Hill was a Vantage howling away and I was well into 3 digits - I enjoyed the sound it made overtaking me though...
That left hander combined with the lane reduction sorts out the BMW's and Audi's to the lets back off lane and then you descend and they bottle out real early on the first lefthander as you watch in the mirror.

Richard,
Whow! Telegraph Hill in that plus 8 of yours makes me feel quite envious.
My Volvo v70 180bhp will romp away up there but I dare not take it to three figures. The 4/4 1800cc struggles and is lost between 4th and 5th gear. Morgasmic its not.