Go Back   AudiWorld Forums > Audi Models > Audi Q3 /Q5 / Q7 > Q5/SQ5 Discussion
Sign in using an external account
Register Forgot Password?


Q5/SQ5 Discussion Discussion forum for the Audi Q5 SUV
Sponsored by: Audi

Welcome to AudiWorld Forums!
Welcome to AudiWorld.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the AudiWorld Forums community today!


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread Display Modes
Old 10-17-2013, 01:19 PM   #1
Audiworld Junior Member
Account #: 268968
 
Join Date: Oct 2013
Location: Calgary, Alberta
Posts: 43
Default Q5 TDI vs 3.0 TFSI Question

I'm thinking about purchasing a new 2014 Q5, but I haven't decided yet between the TDI or the 3.0 TFSI engine.

I wouldn't mind the TDI but my typical driving habits might change my mind on this. In a typical week during the summer I'll usually drive around 5-10 kilometres one way in the morning and then again in the evening each day (not very far). This is city driving only. The weekends in the summer typically involve highway driving for at least a couple of hundred kilometres. It could be much more if we go away on vacation.

In the fall/winter/spring, however, the driving is usually the same 5-10 kilometres in the morning/evening daily but only 50-80 kilometres of more city driving on the weekend (running around town, lots of driving for 10-15 minutes then stopping, repeat). Not much (if any) highway driving at all.

The concern I have is regarding the DPF (diesel particulate filter). From what I've read the DPF usually needs to recharge to burn off the particulates in filter, but that would typically be done once you reach the proper temperatures and then keep it there for an extended period of time (normally highway driving). During this time of year I could end up going for weeks without getting in any highway miles. If I had time, I could take it for a spin on the highway, but that would start to negate the benefits of TDI increased fuel mileage.

I'm wondering, based on my driving habits, if I would be better off getting the 3.0 TFSI and not having to worry about the potential DPF issues?

I have read where this is becoming a concern for quite a few people over in Europe where, due to their long periods of short distance driving only, the DPF is becoming clogged and requires replacing much sooner than would be expected if their vehicles were driven longer distances.

I would typically drive around 15-20,00 kilometres per year, and anticipate keeping the vehicle for the next 7-8 years.

Any comments/suggestions would be greatly appreciated.

Stephen
AlbertaBound is offline   Reply With Quote
Old 10-17-2013, 02:53 PM   #2
AudiWorld Member
Account #: 141694
 
Join Date: Jan 2008
Posts: 170
Default

Totally different vehicle but I know of a Chevy Truck Duramax diesel that went into limp mode for the very reason you describe. Based on that, your concern may be valid.
acadianbob is offline   Reply With Quote
Old 10-17-2013, 06:58 PM   #3
AudiWorld Member
Account #: 248988
 
Join Date: Dec 2012
Posts: 222
Default

If I'm not mistaken the Audi TDI actually has a regenerative function that burns off the particulate filter when it needs to. It can run when the car is turned off and has its own burner within it.
Telate is offline   Reply With Quote
Old 10-17-2013, 07:07 PM   #4
AudiWorld Member
Account #: 28542
 
Join Date: Nov 2001
Posts: 463
Default

Quote:
Originally Posted by Telate View Post
If I'm not mistaken the Audi TDI actually has a regenerative function that burns off the particulate filter when it needs to. It can run when the car is turned off and has its own burner within it.

My Golf TDI works like that. Very disconcerting the first time it happened.

Could well work the same in other VAG vehicles.

.
dsackman is offline   Reply With Quote
Old 10-17-2013, 08:13 PM   #5
AudiWorld Member
Account #: 217581
 
mwaarna's Avatar
 
Join Date: Jul 2011
Location: Miami, Florida a.k.a. "North Cuba"
Posts: 281
Default

Video explaining the new 2014 TDI Engine:

Skip to 12min and 33seconds to learn about the DPF and Burn off:

Is there a way to embed the video to start at a particular time?
__________________
Audi Q5 TDI 2014 Glacier White / Chestnut Brown Link to Picture Gallery

Last edited by mwaarna; 10-17-2013 at 08:18 PM.
mwaarna is offline   Reply With Quote
Old 10-18-2013, 09:17 AM   #6
Senior Member
Account #: 26081
 
Join Date: Oct 2001
Posts: 6,073
Default It does have regenerative...what happens if it gets parked mid cycle?

It has regenerative to burn off the soot--both on the road passively but then actively if the system senses the soot filter is clogging up. Since coming to understand this, I've wondered what would happen if it activates shortly before entering a closed space like a home garage. The once in a while sound effects of the cycling of the rear brakes on shutdown to adjust is one thing. But to have effectively something akin to a self cleaning oven cycle running autonomously that could end up mid cycle in a garage seems like it could be an occasional weird surprise.
__________________
Current #1: '06 D3 A8L W12 brilliant black w/ amaretto; 4 seat setup, CPO; modestly lowered, H&R 20mm rear and 12mm front DRs with 275/35 on OEM polished + forged 20's; S8 sway bars (see: rear bar and gen'l D3 bar info and front bar); tweaked 385mm front factory brake mod and matching rear brake mod; matching C6 A6 back headrests (better rear view: headrest tweak); owner installed AMI retrofit with part number details here.
Current #2: 2013 Q5 2.0T hybrid; Scuba blue w/ chestnut sport interior; Euro delivery 7/2013 (pictured at Ingolstadt)
Prior (each modded): 2000 C5 A6 4.2 & '96 C4 A6 2.8Q, both still w/ family; '85 C3 5000S 5 sp FWD; '73 C1 100LS

helpful cross reference to a C6 post with MMI and other TSB's that also cover D3 A8's.


Last edited by MP4.2+6.0; 10-18-2013 at 10:29 AM.
MP4.2+6.0 is online now   Reply With Quote
Old 10-18-2013, 10:06 AM   #7
Audiworld Junior Member
Account #: 268968
 
Join Date: Oct 2013
Location: Calgary, Alberta
Posts: 43
Default

From what I remember reading there is 2 different types of regeneration for the DPF, active and passive. In the passive mode the particles in the DPF are burned off when the operating temperature is high enough through normal driving (highway driving for 20-30 minutes after everything is at normal operating temps). In my case this probably wouldn't happen very often in most winter months.

The second type is active regeneration (which is what Telate is referring to). From what I read it actually tries to heat up the exhaust gases faster to heat up the DPF to burn off the particles when passive regeneration isn't happening. But even with active regeneration it still takes around 10 minutes. If you turn the vehicle off beforehand it won't complete the cycle and will try and complete it the next time you run the engine.I'm not sure if active regeneration happens as soon as you start the vehicle or if ithas to wait for a few minutes before attempting it.

Bear in mind this is what I've been reading online to try and gather some information.

On the myturbodiesel.com website they mentioned the following:
"European TDI brochures include the warning: "Please note, driving conditions within inner-cities and the Channel Islands may not provide optimum conditions for the use of DPF technology. Therefore, it is advised that you consider this before ordering your vehicle with DPF". This note isn't in North American brochures. The Channel Islands are about 5 miles long so my interpretation of VW's warning is that being restricted to 4-5 mile trips may cause a malfunction due to the DPF not being able to warm up sufficiently."

Interesting there isn't anything mentioned on the North American brochures since I'm sure we've had the DPF for a few years now. Maybe most people who buy the TDI's here don't do a of short trips only. Or maybe the technology has gotten better since then.

Unfortunately I can't find an owners manual online for the Q5 TDI to see if anything is mentioned in there about not taking short trips.
AlbertaBound is offline   Reply With Quote
Old 10-18-2013, 04:02 PM   #8
Audiworld Junior Member
Account #: 245976
 
Q5White13's Avatar
 
Join Date: Oct 2012
Location: Toronto, Canada
Posts: 53
Default

I Think 3.0 TFSI is better than 3.0 TDI based on your driving style in Cagary, Canada.
__________________
2013 Q5 2.0T Quattro Ibis White/Pistachio Beige
- WeatherTech DigiFit Floor Mats
- Mud Flaps
- 1080p Dash Cam./Video Recorder
- USB Cable
Q5White13 is offline   Reply With Quote
Old 10-18-2013, 06:16 PM   #9
AudiWorld Senior Member
Account #: 182428
 
NABS4's Avatar
 
Join Date: Apr 2010
Location: Edmonton, Alberta
Posts: 931
Default

I haven't checked TDI pricing vs 3.0t pricing, but if there is any additional cost to the TDI there may be no overall cost benefit to owning the diesel given your low kms, let alone the possible drawbacks you've outlined. As for power/performance, I call it a wash between the two engines.
__________________
2014 A6 TDI Progressiv Quartz Grey w/sport and nav
Previous
2013 Q5 3.0T Daytona Grey
2009 911 C4S
2010 S4 Meteor Grey
2006 911 C2S
2006 325i
2000 S2000


NABS4 is online now   Reply With Quote
Old 10-21-2013, 12:13 PM   #10
Audiworld Junior Member
Account #: 268968
 
Join Date: Oct 2013
Location: Calgary, Alberta
Posts: 43
Default

I took both the 3.0T and the TDI for a test drive last Saturday. The 3.0T is quicker form a standing start but if you had both of them around 20 kph and floored them both, it would be close. The TDI sucks you back in your seat on acceleration. Both vehicles were very smooth.

In talking with the dealer about the whole TDI/DPF issue, his recommendation as well would be to go wih the gas engine vs the TDI.I don't think he was biased since they had a pile of diesels in their lot to sell but not a single 3.0T. From what he said the 3.0T are hardest to find and get.

Now it is just a matter of seeing if they will come down much on the price. From what I've heard here in Calgary they don't really budge from the asking price, but will throw in extras. I'd rather just have the price lowered.

On another note, the B&O sound system is really good in these vehicles. The TDI had the basic stereo and the 3.0T had the B&O. It's just a shame that up here if you want the B&O you have to order the $4,500 Technik level just to get the option of paying another $1,000 for the B&O. Why they don't offer the B&O in the Progressiv as an option is weird.
AlbertaBound is offline   Reply With Quote
Old 10-21-2013, 12:13 PM
AudiWorld
Audi R8




Paid Advertisement
 
 
 
Reply

Tags
20, 2014, 30, 30t, a6, audi, difference, manual, owners, q5, reviews, tdi, tfsi, vs, youtube


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 11:47 AM.


Copyright 2014 AudiWorld.com Audi Enthusiast Community