The last time I checked, probably 5 or 10 years ago, it was around 32-35 hours in the US, less in Germany. But I recall that this figure is for assembly, paint, etc. only and doesn't include the hours at off-site parts suppliers.
So
To me the economic stimulus a car factory has on a community is well worth the additional $1,500 per car. I am in favor of building cars in R-T-W states, unions not so much.
All of this is predicated the fact that the $1,500 "savings" by using 3rd world slave labor is passed on to the consumer and not the stock holders. Big if....