2.0 TDI 170 Fuel Consumption

**prolfe** · 21-12-2008,08:20 PM

153bhp is probably about right. Superchips and Revo have had the 170 at 182 and 195 as as standard.

I came back from Plymouth the other day, A roads - dual carriage way and then the M3, M25 and M1.

It was a leisurely drive back speed limit pretty much all the way, 70-90 on the dual carriage ways and motorways and got about 48mpg.

**martynah** · 03-07-2009,08:29 PM

how interesting - the golf v variant with this engine I have, I can get 50mpg if driving carefully, drops to about 45-47 normally for my driving, and then about 41 with the aircon on

how strange that the A4 consumption is so much higher?

**richardg158** · 03-07-2009,08:58 PM

Hi all,

Apologies to ambush the Audi thread but I run a VW Passat 170 TDI Estate and found my mpg dramatically improved after 20k. On the run to work 25 miles of A & B roads I always get at least 45mpg and 50mpg on a good day. Even driving it hard I struggle to get less than 40 mpg.

The strange thing is I had a Golf 170TDI (10k on the clock) as a courtesy car a few weeks ago and really struggled to get 40mpg on the same trip, would love to know why these engines seem to vary so wildly?

My mpg is great but i would be a little reluctant to replace with the same as they seem to vary so much.

**randall977** · 05-07-2009,07:20 PM

Amazing! After buying my A4 Avant 170 S Line a few weeks ago I was thinking of posting the same question. 41.5mpg is the average so far - v poor indeed! The book said the overall consumption sould be around 48mpg. I've tried all kinds of driving styles but getting it above 47mpg is very difficult. I'm wondering if I made a mistake getting the 170 - however the twin exhaust helps make up for it! I have to admit the old 1.9 PD TDi's were excellent engines - and they didn't use up loads of oil either.

**martynah** · 07-07-2009,08:30 PM

ah, loads of oil - having just had mine back from getting a new oil-cooler after an 'accident' involving all the coolant being blown out and replaced with oil from the engine, I know all about 'oil consumption'

Still, all better now, and the placebo (sp?) effect applies , having been valeted by the dealer it's obviously faster now.

Dont know about the whole mystery of fuel consumption, I'm at 68k on my 57 plate TDI 170 and it's got better - average to begin with was about 42 now it's 44-45.

**urbanaspect** · 08-07-2009,08:33 PM

Mines just gone over 25k and I've noticed an increase of at least a few mpg over the last few thousand miles.

I'm now getting 40mpg urban which I never used to get on a 10 mile run.

**martynah** · 09-07-2009,08:41 PM

So, some experimental conditions from today (sorry if this is a bit suck-eggs, but this is quite interesting)

- driver only in car.
- 15c outside
- warmed up car
- AirCon OFF, heater 22c middle, 1
- everything else off
- 1/4 tank of fuel (though the results are pretty much the same on a full)
- 70mph 6th gear on the motorway for the entire run
- reset mpg trip 1 while driving
- drive 15 miles ish (I did M4 J12-13)
- check trip 1 av mpg = 48.6

I've done 58k on my golf, so perhaps the more miles the better?

**randall977** · 10-07-2009,11:33 AM

30 mile trip on A roads with very few stops at about 50mph, barely touching the accelerator....46mpg. So where is the missing 15mpg? I phoned Audi and they helpfully told me it was down to the driver - I think it's actually down to their very questionable official mpg figures. Interestingly when I drove it at 80mph it made very little difference to the mpg. Does my car need remapping (currently all the power is delivered at 2000rpm) - would that help? Could poor quality oil make any difference?

I kind of wish I had never retro fitted the trip computer now!

**prolfe** · 20-07-2009,06:53 PM

not hanging around all the time and i can get 38mpg, now while this seems pretty rubbish it really is not hanging around. drive normally and high 40's are normal, drive really economically then 55's are easy.

I used to fill up every time i needed fuel, now its never more than £25 a time.

half a tank of fuel weighs a lot less than a whole tank obviously. less weight, higher fuel economy.

**randall977** · 20-07-2009,10:56 PM

The A3 has a weight advantage over the A4 - my A3 easily does 50+ mpg but it is the TDi 140. Btw, the A3 is a far superior drive to the A4...and a better quality car...but then it's a newer model than the B7!