Depends on which model Commodore.....
VL was definitely the best in my experience. VN & VP were lemons. My VR was pretty good, surviving a few years of DRW!
But a few years ago I took my kids to a VW meet at the Yarra Glen racecourse. We met a guy with a Porsche 356 Speedster. The engine sounded a little rough, & the guy apologised saying, "I need to take her out & thrash her a bit"...
Not bad for a mid 1950s car!!!!!