The haynes will be quoting oil fill with: empty oil filter and up to max line on dipstick - probably oil filter and galleries takes 1 litre to fill. may also include oil cooler circuit .. for instance if you had it on axle stands and took the oil filter off .. the upwards pointing of the front end, may drain some of the oil cooler circuit.
The oil cooler is a heat exchanger device that is near the oil filter .. it is plumbed with a supply from the water cooling of the vehicle .. it may hold perhaps 1/4 of a litre
As you can see all adds up .
You may find this manual much more informative, better written, easier to understand (engine wise) better than the Haynes and the ford one . NOTE : its the same engine in a Leyand Daf Vehical LDV
download and save
LDV 2.5 DI engine manual
https://www.marinedieselbasics.com/wp-c ... ervice.pdf all the best.mark