I was at the Rob Roy Hill Climb for the first time today, (as a spectator.) The fastest time I saw was set by a heavily modified, early model Civic, at about 25 seconds. Intrigued by what makes for a really commendable time up the hill, I searched the MG club site for records, and discovered that on the 20th of October 1994, a certain Hugh Harrison ran a 22.5 in a GTV6. Cool!
http://www.mgcc.com.au/robroy/records.shtml