Regardless of price? Well, heck use Autodesk Inventor, it's in all likelihood what the manufacturer used to design the car in the first place. But unless you're actually a corporation, that's not going to be feasible.

The problem is that there is a stratification of price in the 3D design software ecosystem. The range goes from free, with Blender, Meshmixer, Wings3D and FreeCAD (all of which I recommend), but then jumps to the next cheapest software being Sketchup Pro for $599 and Rhino3D for $995 (and then the big boys like Inventor for $8,000+ which is just obscene).