There should be 4 lines for a Diesel.
PC or Non direst injected Diesel Engines.. PC stands for a pre cup injected
Di or direct injected
NA or naturally aspirated Diesel Engines
DI / turbo..
The most efficient and powerful is the Direct injected/turbocharged engine
you can also add a sub line for inter-cooled..
trying to calculate the range of a Diesel with out this information is use less.
A Pc is the least effective at turning heat in to usable power.
the DI/T-I is the best at varying load and the most efficient at fuel-hours of operation. Its in the 90% range while a pc is more like 50%.
So when i see the term Diesel engine i just cringe..
Sorry, i will get off my sop box now and go back to my little corner of the world.