In the 70s - 110 in a 1966 Porsche 912 on a race course during a weekend SCCA driver's training session.
In the 70s - 132 in a 1965 Porsche 911 between Orcutt CA and Vandenberg AFB - nearly every weekend. (brought over here by original owner a year before 911s were sold in the US).
In the 80s - 105 in a 71 Karmann Ghia convertible (going downhill - with a tailwind).
Early 21st Century - 110 in a 98 Legacy GT.
128 in my 2002 WRX about a month ago.