When should I shift gears up in a diesel car?

I have an Opel Corsa 1.3 CDTI and I want to know at how many rpm I should change the gears up so that the engine doesn't suffer and the consumption still stays low. I have heard that I should shift up in such a way, so that the tachometer remains in the maximum torque interval, which for my car is 1750 - 2500 rpm (from the book). In other words, in the higher gear, the rpm should not drop below 1750 when i shift. Is this true? Thanks in advance and sorry for any typos.When should I shift gears up in a diesel car?
I know a person should shift gears to suit speed, terrain, and traffic conditions. I try to shift gears fairly low on the tachometer but sometimes a person needs to rev the engine a little farther to make the next gear transition smoother. I try not to lug any engine but sometimes it happens. Most newer cars have a shift indicator but you can't always go by that. If your car has a turbocharger like so many other diesels do then you should pay attention to the amount of boost it is providing. Most turbos have a little bit of lag so make sure that you are not overrevving because it might make it harder to shift into the next gear. A person just has to get to know their vehicle to figure all of the necessary details out. Good Luck.When should I shift gears up in a diesel car?
Yep, that's pretty much it.



But depending on your gearing, if you shift at the top of the power band, up to the next gear, you might end up being below the power band after the shift. In this case you have to compensate. Go a little above the power band before shifting.



Anyway you're not going to hurt your car or see a significant difference in MPG so don't worry about it too much.



If you want to save gas just drive slow. It's easier on the engine too.
After u've driven ur car 4 a while u'll know just simply by sound, and another tip is speed will tell u too.
As a semi-retired semi truck driver Progressive shifting will most always benefit a vehicle while accelerating to road speed....However this requires patience and and restraint Because the rat race around you will always be pushing at your rear....trying to hurry you along... find the pace that fits your needs.