This blog has part of the answer - http://argentinaalaska.blogspot.com/2008_01_01_archive.html
I met David in Las Cruces On April 1. He and his wife have used 150 days to drive from Buenos Aires to Ushuaia Argentina to Las Cruces New Mexico. Obviously, not straight through. He told me he has traveled about 18,000 miles, but they started in Buenos Aires, drove south to Ushuaia and started from there.
If you read the blog, you will see that they started on November 22, 2007 from Ushuaia. Argentina. That is about 4.5 months to Las Cruces, New Mexico (USA). David believes that in 2.5 months he will be in Fairbanks, Alaska. Google says that it is about 3800 miles. So, I think you can see the do not plan to rush.
Another link of interest is http://www.pacycletest.com/images/routev3.swf
The route is different from David's and the direction goes north to south, they will ride bicycles, and they don't start until June 2008. However, the link shows each leg of the planned trip and the miles.
This link http://www.argentinaalaska.com/eng/recorrido.htm
provides a map of a trip from 2000 to 2003. They wondered around the U.S. so this does not get to the heart of your question. Nevertheless, you get some documentation about the total miles and can cut out the portions that you are not interested in.
To summarize, let's say that you will drive 18,000 miles and average 300 miles a day. In theory, you would have it done in 60 days. But, don't forget to stop and smell the roses.
Mapquest
2000 miles
its about a four and a half hour drive including stops. it would be about a hour flight.
How long it would take to drive to Argentina depends entirely on where you are starting from.
It takes about 72 hours to drive.
two hour or more
It will take about 61 hours and 40 minutes to drive and is 3,813 miles.
At least 60 hours.
between 13 and 14 hours
Depends how fast you drive, the route you take, the weather, how often you stop, and traffic.
Three days of non-stop driving.
3 days 5 hours