EP6DT (DT = direct injection, T= turbo).
Non-turbo is VTi 95 and VTi 120.
EP6DT (THP150) is a turbo engine, same as THP 155 (EP6DTC).
The difference is:
THP150 has EURO 4 class and THP155 - EURO 5.
Here is the link to the developer of my ECU:
http://etuners.gr/en/index.php?s=13&t=302
Here is the link on wiki:
http://en.wikipedia.org/wiki/Prince_engine#Turbocharged