I've found myself accidentally cruising at 95... which is unusual 'cause I really don't speed, even in cars that are very capable of doing so.
No track access, etc. but one time out in the middle of nowhere (straight line road for 2 miles ahead, perfect visibility, bordered by recently plowed fields so no deer to jump out, etc) I did get it to 110 and then backed off.
When Dad bought the car in '89 he took it to a DE event at Sebring the following weekend, got clocked at 129 on the track. IIRC top speed in that car per factory docs is 134ish ('84 w/ M491 option - bigger heavier body, etc. but normal engine, the slowest of the '84-89 cars but only by a few mph)
Gotta say... much more fun to hit a interstate onramp w/ a 270 degree curve in the 356, go in at 30, come out at 50 and with a smile on my face.... and without breaking the speed limit
It is much more fun to drive a slow car fast than it is to drive a fast car slow.