Vw ACL 2.4 turbo power increase

[axe wound]

Hi all, this is my first post on the forum.
I have a vw lt van 1983, at present it is running a 2.4 dl petrol engine which is very gutless and uses a load of fuel.So i have purchased a Vw ACL 2.4 turbo D,the same engine as the D24t.Buying the ACL meant that i would have all the engine mountings,plumbing for the inter cooler,wiring harness and all the other stuff i would need to transplant the engine into my LT truck.
All ok so far the only problem is that while i was looking at possible engine options i came across the D24t and noticed that it produced a lot more power than the ACL, strange same engine but a load more power and torque!.

OK so what i'm asking is what is the difference between the two engines, is it just settings or are there major changes to the D24t.
The ACL that i have has got oil in the water, i'm hoping its just the oil cooler but it could be the head so i don't want to buy a new head for the ACL if the D25t head is better flowed or has a different cam or other changes.
I hope this all makes sense and i look forward to your posts.
Axe

[3Bar]

The pistons and head are different, as well as likely the camshaft.

Why not turbocharge the ACL, and fit an air to air oil cooler? You just need the exhaust manifold and turbo from a d24t.

[axe wound]

Thanks for the info, the ACL engine is the turbo version fitted into VW LT trucks.
The thing is that the ACL makes a lot less power compared to the D24T

[745 TurboGreasel]

I know in the TD Vanagon, VW went with a slightly lower max RPM, maybe the same applies to Transporters.
I'd almost bet on any differences being in the pump.
Your gas intake may be an upgrade.