I would get a hoist fitted if i were you. It makes it all much more manageable. If your putting down one back seat it can then go long ways. Not many cars will allow it to go width wise until you get into big motors. The old boy who bought my old scooter(a bit like yours size and shape) had an older honda that had a big space at rea and it went in width wise no bother but it was size of a discovery.
I used to fit mine in with a big hoist into a toyota ch-r with the wider back seat folded, and its a fairly small boot. I currently got a folding one and a smaller hoist in back of a kona and there is plenty room left
Current Car: Hyundai Kona Premium EV...2 way 40kg hoist
Last Car: Toyota C-HR Excel Hybrid...4 way 80kg hoist