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Audi A6 - what is the VW common rail diesel engine like? - nik45

i am shopping around for a replacemet . I have seen a fair few VW passat with the common rail engine. How good are these engines? Any common problems? Any problems with DPF? refined?

Please advise?

Thanks

Audi A6 - what is the VW common rail diesel engine like? - groaver

I have a Passat cc with the 170 hp version.

My 1st diesel and so far (2 yrs) it has been great with no issues.

It is a bit growly when cold but quiet when on the move and warmed up.

It does an 18 mile journey each day (work and back) 6 of which is congested town.

I give it a run at the weekends usually to keep things clear.

I took it off variable servicing when I bought it and it gets a 10k one instead.

Computer average is currently sitting at 49 mpg.

I would recommend the engine/car.

Audi A6 - what is the VW common rail diesel engine like? - Roly93

I have an A4 with the TDI 143 engine.

Very refined and quiet, I couldn't stop leaving mine running every time I got home after I sold my PD engined Audi !

Very flexible too compared to the older PD engines. Only slightly noisy on the coldest of mornings for the first minute or so, unlike the older PD engines which were like a 1950's london bus on a frosty morning. I do miss the thug-like nature of the PD engines though !

Audi A6 - what is the VW common rail diesel engine like? - SteveLee

Are these the series of VAG 2.0PD engines with the oil-pump drive issue?

Audi A6 - what is the VW common rail diesel engine like? - groaver

Are these the series of VAG 2.0PD engines with the oil-pump drive issue?

The answer is in the question!

Audi A6 - what is the VW common rail diesel engine like? - craig-pd130

I do miss the thug-like nature of the PD engines though !

Ha, true. They are coa*** and uncouth, but can't half throw a hefty punch ... unlike most thugs, they don't drink much, either :-D

Audi A6 - what is the VW common rail diesel engine like? - Buster Cambelt

I had a Skoda with the 110PS version - pretty awful leaden thing, very rough and noisy, consumed a lot of oil and was never very economical. I had a lot of Skoda loan cars with variants of this engine and found them to be pretty much the same. You will get a lot of palming off by dealers that these engines consume oil until they are "run in", mine just got worse and worse....

I have just had an Audi A5 Cabriolet with the 143PS engine on loan. In 500 miles it acheived 35mpg and the obligatory 0.5 litre of oil. It was very noisy, especially at cold, and shook the whole car. Who on earth thought a diesel went well with a cabriolet.

I could not recommend at all. The only good point is that I almost got run over recently when an idiot went the wrong way down a one-way street. Thankfully the car was a newish Passat diesel and the racket it was making alerted me in time.

Audi A6 - what is the VW common rail diesel engine like? - pinkpanther_75

I currently run a 2.0 CR (110 BHP) in my Yeti. As previously mentioned it is much quieter and smoother than the older PD engines, although lacking a bit of the low down "shove" synonomous with the PD engines.

Mine has used 0.25L of oil over approximately 7K miles and is currently averaging 46 mpg (50% urban / 50% high speed). The best I have seen is 53 mpg, although I'm sure the aerodynamics of the Yeti hold it back at higher speeds.

I am aware of the DPF regenerating (higher tick over) approximately every 350 miles, although have yet to have any warning lights come on. I understand the CR engines are more suited to the DPF, whereas the older PD units, especially in the higher output variants, were more problematic.

I also ran the 1.6 CR (105 BHP) in a Roomster for 10K miles. This was a much rougher unit, which was reluctant to pull from low revs and was noticeably less refined than the 2.0 unit. This returned very similar MPG to the 2.0 in my current Yeti (mid 40's MPG and a best of 52mpg). I did hear that the new owner had managed in excess of 60 mpg on a long run, so maybe my driving style is to blame.

Again I had no DPF related issues with the 1.6 CR, other than being aware it was regenerating from time to time.

A relative has a new Audi A6 2.0 CR with the 174 BHP variant of this engine. This has very similar charateristics to the 110 BHP unit in my Yeti, although engine noise in the Audi is somewhat better insulated than in the Skoda. Again no particular issues with excessive oil usage or the DPF. This car doesn't have a dipstick though and relies on a sensor, which displays the oil level on the infotainement display. This A^ is a big car and returns mid 30's urban and high 40's extra urban.

Edited by Seant on 10/11/2012 at 11:33

Audi A6 - what is the VW common rail diesel engine like? - dieselnut

I have had the pleasure of a CR 140 Passat for the past 10 months, having moved on from a 130 PD Passat, different variants we have owned for the past 8 years.

As Seant states, it doesn't quite have the shove of the PD engine, but also doesn't have its noise or vibration, none of which I found to be a problem when driving anyway.

The CR is at least 10% more fuel efficient despite having the DPF filter.

I did a 100 mile round trip to Manchester on Friday, 40 miles mixed A roads & 60 miles of slowish motorway (65mph or thereabout). It returned 64mpg on the outward journey (cold engine) & 68mpg on the return (engine still hot after a 1 hour stop). This was as registered on the conputer which has proved to be fairly accurate.

The car has 164k on the clock now so is just run in & hasn't needed oil after 6k miles.

I've never noticed it regenerating the DPF, & VCDS tells me it has mainly been doing passive regens. I do a mix of several weeks of short journeys with longer ones ( 150 miles or more) every month or so. I rarely see less than 50mpg at the end of any journey, although we don't have much local congestion in this part of Cheshire.