Yes, a Dodge Intrepid engine will generally fit in a Chrysler Concorde,
provided they are from the same generation. Both cars shared platforms and engines during their production years. However, you'll need to check the specific year and engine code to ensure complete compatibility. Even within the same generation, minor variations might require some adaptation.
For example, a 2.7L V6 from one might bolt right in to the other, but a later 3.5L V6 might require some tweaking of mounts or other components. Transmission compatibility is another important factor to consider.