McLaren P1 (375 ever made)
https://drive.google.com/open?id=1Rf-AjHBOVAE-huBIGWK2YkQS0HpII-r_bsuFdcGDdP8

Duncan also has a lamborghini, but he started with the McLaren because it as a hybrid.  At least if he broke down he could get back.

The only stuff Duncan has in the car is his Go Bag MRE's, water, basic tools, weapons.  There isn't much space, but if she is travelling light she ought to be okay.