Exactly, low FOV is similar to using a high mm lens, makes for less perspective distortion and does help a lot blending the outputs.
I have done a bunch of 3d for the avocado game too the same way.
I´m typically a purist on style blend and will easily jump into the reasons Ian stated before with very little exceptions.
But these low poly cars are so charming that the mixed style does not bother me.
Heck, I almost feel like printing them in paper for decoration.
edit: he might have to adjust the fov to match the line perspective on the road, it may be a tricky thing to match.