I may be wrong but it seems that one of the few (only?) 3D file formats that has a concept of gravity is SKP.
I informed Hum3D about this problem with their Kennedy limo model, but they don’t seem to understand.
Whereas I could try to rotate it by 90 degrees, frankly I would prefer this simple operation to be done by an experienced professional.
Can a kind soul please download the file in question:
and position the vehicle as God -and car salesmen- intended, on its 4 wheels?