I have fit on separate occasions a 550 SX and a SN in my 2008 Saab 9-3 wagon. Not an inch to spare with the SN, but it fit! Guy I bought it from thought I was crazy and was taking pics of it in my car.
A deal popped up (1991 Superjet hull, minus engine, for $20) at short notice so I had to act fast. Tossed it into the back of my 2010 Subaru Forester with a bit of room to spare. I had to take it REALLY easy on corners as it wasn’t strapped down in any way. Made it safely home.
Did I mention I scored a Superjet hull (with alloy pole) for $20?