3.0 ctdi or 1.9 (150) ctdi

**kirky2k4** · 19th December 2010, 14:37

which is best ?

is it true a tunning box on a 3.0 ctdi is not recomended due to prone to cause problems?

**wardy** · 19th December 2010, 15:54

depends what you are after. In standard form the 3.0 is quicker & much smoother, and pulls all the way through the revs. However, it doesn't like being "messed about with".

If you want something you can tune then the 1.9 would be better.

Personally I'd still have a standard 3.0 over atuned 1.9. Just personal preference

**Big-Pete** · 19th December 2010, 16:54

What is best is starting threads in the relevant sections!!
Now moved from General Chat to Vectra c Chat

**Mick B** · 19th December 2010, 17:03

Love my refined 3.0 Cdti Elite in standard form.Not for the heavy tuner though but who needs to

**Innes** · 19th December 2010, 18:45

I see more issues on this thread with the 1.9cdti then the 3.0cdti and thats before tuning! Not to say the 3.0cdti doessnt have problems but they hardly ever seem to crop up!

**krh134** · 19th December 2010, 19:03

Originally Posted by Innes

I see more issues on this thread with the 1.9cdti then the 3.0cdti and thats before tuning! Not to say the 3.0cdti doessnt have problems but they hardly ever seem to crop up!

This would be because there are considerably more 1.9s on the road.

**PORKBALLS29** · 19th December 2010, 19:19

yeah more 1.9's with more problems lol.

**lee gsi** · 19th December 2010, 19:22

Apart from the difference in power (Is there much difference) is the mpg, tax and insurance much difference?

**Maverick** · 19th December 2010, 20:18

I have had both, 4 1.9 CDTi 150's and one 3.0 CDTi.

The 3.0 sounds better, is smoother, excellent low down torque and slightly quicker than a standard 1.9 150. Don't go wrong very often, but when they do, it's mega expensive to put right. Tuning is out of the question as the fuel pump is a weak part when mapped or boxed, but very strong if left alone.

The 1.9 is better on fuel, lower tax and insurance, lower servicing costs and if re-mapped is considerably quicker than a 3.0 CDTi.

In near on 200,000 miles I only had an injector fault on the last Signum I had, other than this I found the 1.9 CDTi to be bullet proof.

Drive both and see which you prefer. If your happy with the lazy running of a V6 then you won't be disapointed. The 1.9 is also an excellent engine and I don't think you would be disapointed here either.

**Celes** · 19th December 2010, 21:09

Originally Posted by Maverick

In near on 200,000 miles I only had an injector fault on the last Signum I had, other than this I found the 1.9 CDTi to be bullet proof.

Drive ONE 1.9 to that sort of mileage and then report back. 4 1.9's with 50k each don't count as proof of total reliability.

To kirky2k4...
1.9 if you want to tune it
3.0 if you want a lazy-smooth and quiet drive