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1850 km one day road trip and 4.2 V8 TDI fuel consumption

947 views 9 replies 7 participants last post by  MiguelEspV6  
#1 ·
I did a quick trip from Melbourne to Sydney and back to pick up a windscreen for my Lotus. A very comfortable 1850 km in 20 hours with it mainly being highway driving sitting on 110km/h on cruise control. The Treg is by far the best car I have ever driven for a long day trip like this.

An interesting outcome was the actual calculated fuel consumption based on tank refilling before the trip, then filling when i reach Sydney and then when I refilled on getting back to Melbourne was 7.8 L/100km which was exactly the same as the dash read out of average fuel consumption for the 1850 km trip. I have always suspected the dash read out is normally low as it integrates the short term number which has a maximum reading limit or around 40 l/100km which is easy to exceed in the city when accelerating away from lights, this seems to confirm that

There are a few hilly regions and i had a Northerly head wind when heading North and no tail wind when heading back South at night as the wind had dropped then. When on flat roads with no winds the Treg ran at 6.8 l / 100 km at 110km/h

Incidently
7.8 l/100 km = 30.2 miles / US gallon = 36.22 miles / imperial gallon

The other interesting observation is that i averaged 92.5 km/h including the suburban streets 60km/h limited when in Melbourne and Sydney and despite freeway speed limits of 100 or 110 km/h in between. I live in Germany for about 6 months of the year and find it hard to achieve that sort of average speed for a long trip despite much higher or no speed limits on the Autobahns. This is due to the number of road works and slow traffic you encounter all the time
 
#3 ·
I regularly achieve 8L/100km or better with my 2015 3.0l TDI. These really are the best engine/vehicle combos VW has released in at least 25 years.
 
#4 ·
Damn that V8 is making better mileage than my V6 TDI! My lifetime best-ever calc in Fuelly was 30.5, and that was 100% highway calculated. 0 off-highway driving. I typically get 27-29 in highway calcs and 22-26 in mixed driving calculations. I am sure the V8 skews a bit lower in the mixed driving though.
 
#5 ·
Agree, brilliant VW power and consumption setup, beats small cars and hybrids as well in some cases....
It's common to get 6l to 100 around town and easily on the highway when not lead footing...
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