Omega Owners Forum
Chat Area => General Car Chat => Topic started by: Sixstring on 29 June 2010, 12:27:20
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Please can someone educate me on the differences between the two diesel models, the TD and the DTI. am relatively good with engines, but fail to see why one is more desireable than the other.
thanks in anticipation......
Mike.
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as far as I know td is bmw straight 6 and dti is vauxhalls own 4 pot
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dti has common rail, td hasn't (I think :D)
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I believe the TD is indirect injection .. to a swirl pot outside the combustion chamber, the DTi is direct injection into the cylinder ??
indirect injection keeps the temperatures lower and the mixture does not have to be quite so accurate, so mechanical injectors work
direct injection is only possible with electronic injectors and high temperature alloy pistons
Thats my understanding anyway :)
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dti has common rail, td hasn't (I think :D)
Right ;)
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I believe the TD is indirect injection .. to a swirl pot outside the combustion chamber, the DTi is direct injection into the cylinder ??
indirect injection keeps the temperatures lower and the mixture does not have to be quite so accurate, so mechanical injectors work
direct injection is only possible with electronic injectors and high temperature alloy pistons
Thats my understanding anyway :)
Not quite.
The DTi is direct injection but, its not common rail.
The DT does use swirl pots.
The DTi is the under rated Vx 4 pot and the DT is the over rated BMW 6 pot ;D
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dti has common rail, td hasn't (I think :D)
Right ;)
CDTi has common rail.....DTi does not
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Please can someone educate me on the differences between the two diesel models, the TD and the DTI. am relatively good with engines, but fail to see why one is more desireable than the other.
thanks in anticipation......
Mike.
DTi is more common, more economical, not sure about reliability.
TD not so common now, economy good if driven sensibly, chipped or not. Reliability good if serviced correctly.
I think the desirable bit is, well it's a BMW 6 pot and it seems to be the clincher, rather like 4 pot v 6 pot petrol Omega's, most would choose the 6 pot.
Mick ;)
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dti has common rail, td hasn't (I think :D)
Right ;)
CDTi has common rail.....DTi does not
Mark, on the subject of CDTi engines.
What's your thoughts on these, the one that's fitted to the Vectra that is (sorry) Is it good, one to avoid, what to watch out for. You have the Zafira, is it the same engine?
Sorry to hi-jack this thread.
Mick
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dti has common rail, td hasn't (I think :D)
Right ;)
CDTi has common rail.....DTi does not
Mark, on the subject of CDTi engines.
What's your thoughts on these, the one that's fitted to the Vectra that is (sorry) Is it good, one to avoid, what to watch out for. You have the Zafira, is it the same engine?
Sorry to hi-jack this thread.
Mick
Same engine
Key issues are:
DMF - Can rattle particularly if the previous owner has a digital foot on the clutch
EGR - Can stick, easily cleaned, no big issue.
Swirl Flaps on the 150 bhp 16V - Pretty much sorted as of about 2007 with most troublesome early ones having been changed for the later type.
Quite a driveable unit....mine returns 50+ Mpg every week without fault and I have covered 30K+ miles in it.
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Should add, the 3.0 V6 CDTi is quite nice
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I once had a W reg 2.2 DTI Vectra as a hire car, i was very pleased with it and the performance was great.
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6pots sounds better than girly 4pots ;D ;D ;D ;D :y
thanks for the wright answer mdtm
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So the BMW lump is the better engine for performance/economy???
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So the BMW lump is the better engine for performance/economy???
Take a look at mine Mike when you come over! :y
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Just thinking over having a Diesel saloon aswell, Byron.....best of both worlds then, cheaper than buying a newer 3.2 elite estate, but as i don't really want to part with my 99 estate, will drive the wheasel day to day to work in Bristol, and play with it a bit......keep the estate bog standard. Might even get a non m.o.t one and "do it up".
Have a "project car"......
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I believe the TD is indirect injection .. to a swirl pot outside the combustion chamber, the DTi is direct injection into the cylinder ??
indirect injection keeps the temperatures lower and the mixture does not have to be quite so accurate, so mechanical injectors work
direct injection is only possible with electronic injectors and high temperature alloy pistons
Thats my understanding anyway :)
Not quite.
The DTi is direct injection but, its not common rail.
The DT does use swirl pots.
The DTi is the under rated Vx 4 pot and the DT is the over rated BMW 6 pot ;D
That answers my question ;D :y :y