Later VAG - PD and TDi Differences ?

[redgriff500]

Hi guys,

I'm looking for a replacement for my wife's 2003 A6 Avant, it is the 1.9 PD 130bhp Multi-tronic

Whilst we haven't had a problem with the gearbox I know many have so I'd like to get the later DSG box which I believe means another A6 is out as I don't want a 4WD.

Looking therefore at an 05 - 07 Octavia and Passat (must be big, auto, economical and 5dr)

The Octavias appear to be PD (even the 2.0) whilst the Passats and most of the VAG group seem to have gone back to TDi - why is this and does it matter ?

Thanks

[uncinquesei]

The latest TDi engines are now common rail not PD, which is sort of amusing if you've ever spent any time being told on training courses by Audi trainers how superior PD is to common rail...
The PD designation quietly slipped away in the night and just TDi remains.
if i can find the training material i'll share it...

PS no A6s have had DSG fwd or quattro. Quattros are traditional tiptronics.

[redgriff500]

Yes thats what's confusing me !

When I bought the A6 everyone said "you want a PD" and they were more powerful than TDi now VAG seem to have reverted to TDi / common rail like everyone else.

I wondered why ?

Emmissions ?

[danyeates]

You have...

TDi PD (pumpe dusche)

and

TDi CR (common rail)

Both are TDi, just a different injection method.

ETA: the Octavia was PD until about 2009 I think, then it went CR. Both are 2.0. There was also the earlier 1.9 TDi engine.

Edited by danyeates on Wednesday 9th February 13:08

[va1o]

The CR TDIs are much smoother and more refined, the power delivery is spread across the rev range

[DaveL86]

va1o said:

The CR TDIs are much smoother and more refined, the power delivery is spread across the rev range

This, I drove a 2.0 CR TDi (140) and I was surprised how much the engine tech had moved on from my PD.

Comparison:

http://www.youtube.com/watch?v=jsxLJQCBDDo

[Superhoop]

wasn't the move from PD to TDI CR because of DPF's? Something to do with PD's not being able to offer the post injections required for regeneration?

[944fan]

va1o said:

The CR TDIs are much smoother and more refined, the power delivery is spread across the rev range

Until the approx. £1000 high pressure fuel pump breaks, making some serviceable cars beyong economical repair!

[frosted]

You should try and avoid tdi vag cars that were built between 2005-2007 as it seems a few if them had failed injectors

The cr is a lot smoother but I like my pd , it's a kick in the back in 2nd 3rd and 4th 5th and then it sort of cruises in 6th

[frosted]

944fan said:

Until the approx. £1000 high pressure fuel pump breaks, making some serviceable cars beyong economical repair!

Does it really , i would like to know how many cr tdis had this problem in 18 months that they been out

[RobCrezz]

944fan said:

Until the approx. £1000 high pressure fuel pump breaks, making some serviceable cars beyong economical repair!

didn't the PD have a high pressure pump on each injector though? doesn't sound cheaper!

[Tobias Funke]

944fan said:

Until the approx. £1000 high pressure fuel pump breaks, making some serviceable cars beyong economical repair!

The injectors on the PD engines were around £500 each from dealers IIRC, the fuel pumps weren't exactly cheap either.

[redgriff500]

frosted said:

944fan said:

Until the approx. £1000 high pressure fuel pump breaks, making some serviceable cars beyong economical repair!

Does it really , i would like to know how many cr tdis had this problem in 18 months that they been out

The VW 2.0 CR TDi hasn't been out long in some models (like the Octavia) but has been out since 2005/6 in the passat.

But ALL the common rail cars have expensive high pressure pumps but the VAG PD runs even higher pressures but run by the camshaft.

[944fan]

frosted said:

Does it really , i would like to know how many cr tdis had this problem in 18 months that they been out

Hold on, let me check my database of VAG CR fuel pump problems experienced by owners in the last 18 months.

[frosted]

944fan said:

Hold on, let me check my database of VAG CR fuel pump problems experienced by owners in the last 18 months.

Exactly my point , I doubt that there would be many

[944fan]

frosted said:

Exactly my point , I doubt that there would be many

Might want to read this:

http://forums.tdiclub.com/showthread.php?t=299854

[frosted]

That was a waste of 60 seconds of my life , can I have them back please

[944fan]

Sure 'ere you go.

[frosted]

I'm sorry , but I will have to disregard your post because what you showed me is from another continent

[va1o]

frosted said:

I'm sorry , but I will have to disregard your post because what you showed me is from another continent

Yeah, totally irrelevant to the UK.