Audi A3 poor efficiency?

Interesting the above, the 2.5t mondeo seems for some reason to be the dead opposite.

At 70mph on the cruise (2krpm) it hovers at 30mpg (it also feels sluggish), up that to 80 and it feels much better and gets nearer 35mpg.
 
I doubt that unless there is something wrong with it or you aren't using your gears properly on inclines/dips.
 
breadturbo said:
Interesting the above, the 2.5t mondeo seems for some reason to be the dead opposite.

At 70mph on the cruise (2krpm) it hovers at 30mpg (it also feels sluggish), up that to 80 and it feels much better and gets nearer 35mpg.
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That's not my experience with my 2.5t. Sounds pretty strange to me. The lower the speed in 6th the better mpg.
 
Stock apart from injectors, intercooler, induction, turbo, and engine mapping?

So... Not stock at all? :p

320HP though, must be fun. And surprising! Handling/visual mods? :)
 
oli356 said:
When I was watching it "live" it was often in the 30s and then going up to 60 - 100 if going down a slope.

Well, at least people think its ok so I can stop worrying now. I don't do tonnes of miles anyway (yet bought a diesel I know), so the £ in fuel isn't probably a huge amount away and I like the car overall :)
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Do it again without cruise being on, it is only efficient if the road is flat and there is no variation in your speed due to traffic..
 
Acme said:
Stock apart from injectors, intercooler, induction, turbo, and engine mapping?

So... Not stock at all? :p

320HP though, must be fun. And surprising! Handling/visual mods? :)
Click to expand...

it's got JW coilovers, lowered just 25mm front, 35mm rear, the standard brakes I find mroe than upto the task.
Other than that it's bone stock, (minus the 2.5t badges as some chavs stole the 't's no doubt to put on there 106.
 
As a rule of thumb you'll use ~15-20% more fuel driving at 80mph vs 70mph.

Like others have said, averaging 45mpg when doing 80+ is pretty good.
 
I haven't actually done any 'proper' measurements on my car but according to the OBC, 70mph is about as efficient as ~90mph (maybe slightly better). 80 appears to give worse figures. I'm guessing it has something to do with the effect of coming on boost? I'm not really sure why that'd be the case though...

I could, of course, be talking crap :p
 
breadturbo said:
Interesting the above, the 2.5t mondeo seems for some reason to be the dead opposite.

At 70mph on the cruise (2krpm) it hovers at 30mpg (it also feels sluggish), up that to 80 and it feels much better and gets nearer 35mpg.
Click to expand...

Mine feels much more "into its stride" when doing 80+ tbh but it's most certainly noticeable from the mpg reading (the dial under the Rev counter on bmw's rather than the obc) at 80 the mpg reading hovers below 30 where at 70 it hovers above.

A trade off ultimately, more speed and responsiveness @80 but better mpg if a bit lethargic in feel when trundling along @70.


The mpg my truck gives @50 compared to @55 is surprisingly better, 10mpg is easily achievable even @44t gross, running at the limited speed of 55 gives 8.5 to 9mpg at best, which at this consumption level is quite a difference.
 
Our Mk3 Leon has the 184 bhp engine and on regular long distance trips I can average 60 mpg with cruise set at 70 mph (a few miles of mixed use either end of the trip), drop that down to 65 mph and I'm closer to 65 mpg. Ambient temperature makes a surprising different (probably combined with winter diesel) and any trip with a DPF regen can bring that down to mid 50's and with cruise at 80 mph 50 mpg is the most I achieve.

In isolation I'm happy with that but if I use my F31 330d for the same trips it is pretty easy to get 50 mpg (& 13p rather than 11p back from my employer) so the cost difference is pretty small. Just a shame that I have to be conscience of my mileage limit on the BMW and oddly it's replacement (Focus RS) would cost me less to run because of getting 20p a mile for fuel.
 
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