dorthin gehen vs hingehen

Question

In Michel Thomas' German Foundation Review he says:

I want to go there

is either:

• Ich will dorthin gehen

• Ich will hingehen

How can these two be equivalent?

What are the subtle nuances which distinguish them?

Answer 1

Let's add emphasis to make it clear:

Ich will dorthin gehen.
I want to go there

You point the finger to the location where you want to go. It is in contrast to going to a different location / into a different direction.

Ich will hingehen.
I want to go there

You state your decision to go there, in contrast to staying at home. "There" could either be a location or an event/activity/presentation; what exactly would have been the topic of a previous sentence.