Ben, according to my factory Toyota 1HZ engine repair manual, which covers the 1PZ, 1HZ and 1HD-T diesel engines, 1HD-T is what Toyota calls the factory turbo'd 1HZ used in the 80 series.
I believe the 1HD-T was superceded by the 1HD-FT and then the 1HD-FTE.
Don't know what they use now though, some sort of V8?
Cheers.