Well, there is this:

http://www.grumman.net/cgrcc/aa5-180compare.html

Nice chart, but the information for the Cherokee 235 line is
inaccurate. To bunch that many 235 variations together from 1964 to
1977 into one performance category is wrong -- the plane changed
dramatically during that 13 year span, even changing names several
times.

For example, a pre-1973 PA28-235 has a smaller interior, fuselage fuel
capacity, and empennage size. The chart also shows 235s having a
fixed-pitch prop, which is wrong for anything after (I think) 1970.
The '74 Pathfinder that we own is a far different plane than a 1964 or
even '72 Cherokee 235, in ways that directly impact (or should impact)
the purchasing decision of any potential buyer.

These are not subtle differences. If you're looking for a true 4-place
plane, a post '73 Cherokee 235 is hard to beat. A pre-'73 Cherokee 235
is not suitable for hauling back-seat passengers, IMHO, and should be
avoided if you're really going to be hauling four adults.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"