Originally Posted by Send Clowns
What are you calling a reasonably-sized adult? I have some hours on the Archer, and I would not put 4 and full fuel in, at least not without weighing each person and calculating the weight because I don't think it would be legal with 4 adults unless they were of modest weight, averaging less than 12 stone if no baggage is carried.
I would concur that a PA-28 (any of them) is not a 4-pass aircraft with full tanks. If you want to carry 4 with max fuel, perhaps you might consider a Cherokee 6 or a C206.