Discussion
carsarecool said:
gizlaroc said:
Manual pre efficient dynamics around 40 mpg and auto around 34mpg.
Manual post efficient dynamics around 48 mpg and auto around 42mpg.
It's a 55 plate, 2005, so I'm guessing that is a pre model?Manual post efficient dynamics around 48 mpg and auto around 42mpg.
Resurrecting an old topic here, but can anyone tell me what the main differences are between pre and post Efficient Dynamics on the 520d. 8 mpg is quite a lot, and does explain why my 55 plate touring isn't quite as good on fuel as I thought it would be - Looks like I did my pre buy research with owners of later cars !
Main difference is a completely new engine, gearbox and mapping.
I would say the difference is actually more than 8mpg.
I went from a 163bhp car to the 177bhp version and was getting 8mpg more, however my 320d has now done 18k and will easily see another 10mpg on a run compared with new.
I had a new (3k miles) 177bhp one on loan yesterday and that was showing 38.7mpg on a run, I do that journey all the time and will see 48mpg in mine now without trying at all.
Mine are autos by the way, a manual will see a good 5mpg more.
So 163bhp auto run in was 32 noramlly and 38mpg on a run, the 177bhp is now 42mpg round town and 50mpg on a run.
I would say the difference is actually more than 8mpg.
I went from a 163bhp car to the 177bhp version and was getting 8mpg more, however my 320d has now done 18k and will easily see another 10mpg on a run compared with new.
I had a new (3k miles) 177bhp one on loan yesterday and that was showing 38.7mpg on a run, I do that journey all the time and will see 48mpg in mine now without trying at all.
Mine are autos by the way, a manual will see a good 5mpg more.
So 163bhp auto run in was 32 noramlly and 38mpg on a run, the 177bhp is now 42mpg round town and 50mpg on a run.
Thanks for that - Explains it all. Mine is an '05 520d M sport touring manual, and I am averaging about 40mpg which seems to be 44 'ish on motorway runs and mid 30's on stop/start stuff. I did try really hard for one tank on mainly motorway driving and got it up to 49, but that was a pretty painful experience that I don't want to repeat ! Looks like as and when I update I will see a big difference.
Are there any plans to put the twin turbo 2 litre from the 123d into the 5 series ?
Are there any plans to put the twin turbo 2 litre from the 123d into the 5 series ?
BMW don't say that, the test that BMW has to do says that.
That is the extra urban figure, and that is never going to be achievable because real world driving is never going to be like that.
The test is a joke and out of date, it is also done on a rolling road which doesn't really take into account the vehicles weight.
To be fair though the 520d is a very impressive all round car that does have excellent mpg compared with everything else in its class.
That is the extra urban figure, and that is never going to be achievable because real world driving is never going to be like that.
The test is a joke and out of date, it is also done on a rolling road which doesn't really take into account the vehicles weight.
VCA said:
Urban cycle
The urban test cycle is carried out in a laboratory at an ambient temperature of 20°C to 30°C on a rolling road from a cold start, i.e. the engine has not run for several hours. The cycle consists of a series of accelerations, steady speeds, decelerations and idling. Maximum speed is 31 mph (50 km/h), average speed 12 mph (19 km/h) and the distance covered is 2.5 miles (4 km). The cycle is shown as Part One in the diagram below.
Extra-urban cycle
This cycle is conducted immediately following the urban cycle and consists of roughly half steady-speed driving and the remainder accelerations, decelerations, and some idling. Maximum speed is 75 mph (120 km/h), average speed is 39 mph (63 km/h) and the distance covered is 4.3 miles (7 km). The cycle is shown as Part Two in the diagram below.
Combined Fuel Consumption Figure
The combined figure presented is for the urban and the extra-urban cycle together. It is therefore an average of the two parts of the test, weighted by the distances covered in each part.
It is only done when the car is already up to temp, and on a diesel like the 520d that takes around 10 minutes or 8-10 miles on a dual carrigeway, and this is where our nice averages start to plummet. If you could log the amount of sub 10 mile journeys I think you would be amazed how many you do. The urban test cycle is carried out in a laboratory at an ambient temperature of 20°C to 30°C on a rolling road from a cold start, i.e. the engine has not run for several hours. The cycle consists of a series of accelerations, steady speeds, decelerations and idling. Maximum speed is 31 mph (50 km/h), average speed 12 mph (19 km/h) and the distance covered is 2.5 miles (4 km). The cycle is shown as Part One in the diagram below.
Extra-urban cycle
This cycle is conducted immediately following the urban cycle and consists of roughly half steady-speed driving and the remainder accelerations, decelerations, and some idling. Maximum speed is 75 mph (120 km/h), average speed is 39 mph (63 km/h) and the distance covered is 4.3 miles (7 km). The cycle is shown as Part Two in the diagram below.
Combined Fuel Consumption Figure
The combined figure presented is for the urban and the extra-urban cycle together. It is therefore an average of the two parts of the test, weighted by the distances covered in each part.
To be fair though the 520d is a very impressive all round car that does have excellent mpg compared with everything else in its class.
GR4 said:
Thanks for that - Explains it all. Mine is an '05 520d M sport touring manual, and I am averaging about 40mpg which seems to be 44 'ish on motorway runs and mid 30's on stop/start stuff. I did try really hard for one tank on mainly motorway driving and got it up to 49, but that was a pretty painful experience that I don't want to repeat ! Looks like as and when I update I will see a big difference.
Are there any plans to put the twin turbo 2 litre from the 123d into the 5 series ?
I thought we would have seen it in the 3 series facelift but that doesnt seem to be the case. I guess we wont see it the 5 series now until the launch of the e60 replacement next year, the F10.Are there any plans to put the twin turbo 2 litre from the 123d into the 5 series ?
Extra Urban means out of town, and in the case of the test it means a car doing 39mph.
If you drive your car at 39mph average, accelerating once to 75mph and then let it idle back to a stop.
This is giving a completely false reading of motorway and dual carrigeway driving where we are constantly slowing down then accelerating again for traffic and roundabouts etc.
I always think that I will get somewhere just above urban for a diesel and just below the combined consumption for a petrol.
Extra urban is only possible sat in steady traffic at 40-50mph, slow down a couple of times or hit some junctions and it goes out the window.
If you drive your car at 39mph average, accelerating once to 75mph and then let it idle back to a stop.
This is giving a completely false reading of motorway and dual carrigeway driving where we are constantly slowing down then accelerating again for traffic and roundabouts etc.
I always think that I will get somewhere just above urban for a diesel and just below the combined consumption for a petrol.
Extra urban is only possible sat in steady traffic at 40-50mph, slow down a couple of times or hit some junctions and it goes out the window.
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