89mm
With the exception of special purpose shocks, i have been of the belief that ALL double action shocks had much less damping on the compression stroke, than on the extention stroke. Many cars had single action shocks that had NO damping on the compression stroke. Even the poverty pack EA Falcon of the early '90's had single action shocks.

The one car that i DO remember for it's shocks was the early 50's Austang A40. By the time these things had a few miles on them, many had shocks that did not work at all. Since the shock was a structural part of the suspension [top wishbone] it was a major, & expensive, job to replace, & many wern't. It was always funny to watch one pull up at the lights or a "halt" sign & watch the front end bobbing up & down for what seemed like minutes after the car stoped.
The best part about those good old days is the fact that they are over. Bring on the good new days.