When I had a visit to my Mitsubishi dealer 3 years ago to check out the boot and scooter space with my then Pride scooter that was 39” long would not fit, not fully assembled anyway and my current scooter is 41” long so would be an even a bigger no no.
The sales guy recommended I went for the standard petrol or diesel versions but looking at there MPG numbers made me cry.
The only option is to go for the fold away type scooters to be sure of a good fit in the PHEW but then these type of scooters will fit in almost any type of car but are expensive to buy and feel a bit flimsy for my liking.
Only way to be sure is do what I do and visit the dealer with a tape measure.