640d GC Engine noise and MPG

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I’ve been doing lots of miles over the past few weeks and this week I decided to see what I could get from a full tank of fuel.

So Eco Pro mode most of the time and I managed 680 miles and a genuine 47mpg which I’m rather impressed with. This was mainly motorway miles but also trips into Birmingham and Manchester City centres in rush hour traffic.

Anyway I have noticed that engine sounds different in Eco Pro mode at low speed so does anyone know what it does other than change throttle response and gear changes?

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river_rat said:

680 miles is impressive, I've never managed more than about 560 out of my 640d coupe (assume they have the same size tank).

I had 25 miles left too!

The last trip was from my house in Stone, Staffordshire to Manchester Royal Infirmary via Rudyard so all cross country and then back home down the M6.

On the motorways I was sitting at 70 or just under but still had the odd burst to get past stuff.

I generally didn't use cruise control as that prevents the car from coasting.

I reckon 750 could be achieved with the right conditions. When I filled up it showed 792 range😀

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MikeM6 said:

I suspect it has artificial engine noise in other modes they are either off or toned down in Eco Pro.

I’d not thought of that.

The only way to describe the noise is that it reminds me of being on a bus as a kid.

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Thanks for all the comments.

I think if you drive these as intended over long journeys they make a great car. Just by changing my driving style a little I’m getting better economy and enjoying the car more.