the 116d uses a 2.0 litre N47 diesel engine
the 116dED uses the 1.6 litre diesel engine from the Mini
that's why there is slower in gear acceleration
I have a 116d Non-ED and I managed to achieve 64.4mpg UK (4.4 L/100km) driving at about 70mph on the motorway.
I find cruise control significantly reduces consumption on the motorway too, so I try and use that as often as possible.
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