Whats a realistic ball park figure for MPG for an Octy 4x4 estate in both FSI and tdi spec.

I think that the petrol version is a bit cheaper to buy used and was wondering if this could be offset against the better mpg of the diesel

Thanks

We've had both the 1.9TDi 4x4 (just changed) and the 2.0TDi 4x4's (current cars).

For the 1.9TDi we averaged high 40's in general driving (47 on a cross country mainly single carriageway A roads run as pretty good average) and mid to high 50's on a motorway run. Around town and short journeys you should still see high 30's and low 40's.

The 2.0TDi is still running in (just 1400 miles so far) but I'm seeing 38/40 around town, 47/48 motorway mileage. I expect this to improve as it runs in (I was getting under 40MPG motorway mileage when I first got it).

The 1.9TDi is therefore more efficient, but the 2.0TDi is significantly more powerful and seems much smoother to drive.

All figures as per the on board computer.

Not tried the FSi, so cant comment on that.

Neil.

For the 1.9TDi we averaged high 40's in general driving (47 on a cross country mainly single carriageway A roads run as pretty good average) and mid to high 50's on a motorway run. Around town and short journeys you should still see high 30's and low 40's.

:iagree: Cruise Control also improves MPG

I get about 52mpg according to the trip computer overall in a 2wd 2.0TDI

I'd expect the 4x4 to be a bit lower but not a huge amount

My 1.9 TDi must be different to everyone elses, steady 70 ish on the motorway gets me 45 - 50 mpg. Very rarely do I see over 50 on any kind of driving.

I get a normal 42-44 mpg on a daily basis and 48-51 on a long distance run (400 miles trip to reading @ 70ish )

(in my 2.0TDI)

My 1.9TDi has averaged 50.7 over 33K miles, mailnly m/way with cruise set to 78mph indicated. This is real MPG calculated from miles covered and the litres of diesel put in. The calculated is typically 3-4mpg below what the trip computer shows. The Mk1 Octy I had before (old 1.9TDi) did 52.3 over the same distance. The trip computer was similarly optimisitc on that too as it is/was on several of my colleagues golfs/passats.

on a run from sheffield to norwich 150 miles our 1.9tdi 110 returned 57.7mpg and the same the time before on the same run and speeds were on the high side

My 1.9TDi has averaged 50.7 over 33K miles, mailnly m/way with cruise set to 78mph indicated. This is real MPG calculated from miles covered and the litres of diesel put in. The calculated is typically 3-4mpg below what the trip computer shows. The Mk1 Octy I had before (old 1.9TDi) did 52.3 over the same distance. The trip computer was similarly optimisitc on that too as it is/was on several of my colleagues golfs/passats.

I hope that we will see some improvement then. Our new Octy II 1.9 TDi is only managing 42, mixed driving, but mainly short distances with the occasional longer trip. This is calculated not computer.

However only just over 2000 miles so far, when should it start to improve as I gather it should?

Mine started out doing about 48 but improved to 50 after 5000 miles. In town driving the computer shows about 47-48mpg, but it doesn't take long to show over 50 once out of the stop/start stuff. The best figures are usally on single carriageway A-road when the traffice is light, seeing 60+mpg on the computer (probably mid to high 50's real) not unusal. The lowest calculated I've had on one tank-full is 47.6.

If you're after economy, consider having the petrol model converted to run on LPG/Autogas. The actual economy isn't great but the fuel's so cheap it's easily worth it. My 4x4 mk1 has the 1.8T engine and has cost me an average of 7.44 pence per mile over the last 1511 miles. Even if you add on, say a tenner, for the first few minutes that run on petrol, it's still only 8.1 ppm.

I don't think you can rely on the computer for MPG calculations. After all, the speedometer over-reads and has anyone ever had a really accurate fuel guage in ANY car? They're presumably what the computer relies upon for its calcs.

You've surely got to do it the old way: fill her up to the brim and count the miles until next brimming the tank. You can find out how much the speedo over reads by getting a satnav!

Don't do this if you prefer not to be disappointed by your "in-car abacus"...

Happy New Calculations!

the dill

You've surely got to do it the old way: fill her up to the brim and count the miles until next brimming the tank. You can find out how much the speedo over reads by getting a satnav!

That's the way I've done it for years, I even have a spreadsheet on my PDA to get an accurate MPG...Sad I know!

I don't think you can rely on the computer for MPG calculations. After all, the speedometer over-reads and has anyone ever had a really accurate fuel guage in ANY car? They're presumably what the computer relies upon for its calcs.

You've surely got to do it the old way: fill her up to the brim and count the miles until next brimming the tank. You can find out how much the speedo over reads by getting a satnav!

Don't do this if you prefer not to be disappointed by your "in-car abacus"...

Happy New Calculations!

the dill

Yes this is the only accurate way, unless you go to a lot of trouble.

You can however calibrate the mpg meter, AFAIK.

Also, it doesn't use the fuel gauge, it uses relatively accurate engine data to work out how much fuel is used, such as the mass flow meter and the injector timing data. It does however use the odometer reading which is not deadly accurate given variable tyre pressures etc., but you are relying on this for your paper calculations anyway, don't forget...

You can however calibrate the mpg meter, AFAIK.

Really? How?

I agree that it uses the data from the ECU, not the fuel guage, although it may use the fuel guage to tell you how many miles' worth are left in the tank. Incidently, the garage that converted my car to LPG said that from 2001/2, the fuel guage itself uses cumulative data, i.e. it doesn't pay attention to the position of the float. I guess it must read the float when you start the engine, or refuel, or something, and subtract what it thinks it's used from that reading thereafter. He mentioned this because some cars on LPG show the petrol fuel guage going down even when you're running on gas.