Yes, you can-if you have deep enough pockets. The DOT/NHTSA has a list of approved importers who can "federalize" one for you.
Expect to pay the purchase price again for this service and don't expect to get a diesel in the US legally. There are no recent manufacture Land Rover diesel engines that can be legally imported.
Yes, I am still alive, and still in the Rover parts business.
Text me for greatest likelihood of finding me.
Dominic Perodeau/Global British is a thieving bastard, do not send him money.