Of course there are many many variations of the weights and fuel burns and speed. All Cessnas are set up a little different and all pilots like to run them their own way. I was going with a general average and using my personal experience.
I have flown/been in a 180hp 170B that won't fly faster than about 120mph and I've flown/been in 4 of them that will cruise at 130-135+mph.
All with various tire sizes, wing stol kits, prop sizes. Real scale weights in the mid 1300 range.
Take a look at the post with real world 180 weights to see some good variation there.
https://backcountrypilot.org/forum/the- ... read-19604
Sure 180s can go faster and burn less gas if you run them differently or they are set up different, but then look at Dave Stoots or John Nielson's speeds and fuel burn with a 170 and you can see there is a large range for both birds.
As for finding a good deal Dirt911 they pop up every so often and get bought quickly. Another good way to find one is to cruise the airports and seek the 170 owners out. Many will entertain offers and are thinking about selling but haven't posted them.




