General 4x4 Multijet motorway mpg

[The Panda Nut]

I have searched but not really found a closer answer for the MJ..
I see most Twin Air generally average 45mpg especially if driving enthusiastically... (Maybe less at motorway speeds)
Will a MJ be much better? (50mpg? 55mpg?)
My current commute entails mainly a motorway run, but that will prob change to a cross country run in a few months..

Or, would the Twin air be more fun to drive and the fuel price difference negate the extra mpg... ??
I can spend up to 6k..
Any difference in maintenance costs would not really affect me as I do pretty much all my own maint, so either would be serviced every 6-8k, regardless.

Some quick number calcs puts the MJ about £100 better off calculated over 20k miles (assuming 45mpg/50mpg and using gov expense claim ppm) so in my opinion, not worth worrying about.. so it would come down to the realistic mpg, better/fun drive, balanced with ultimate reliability over extended miles. (It will get some miles racked up)
Any insights welcome..
Cheers Si.

Edits for extra thoughts..

Change that to 35mpg and you should be safe.

 

[WitleyPanda]

My previous, 2012 diesel 4x4 easily managed 60mpg. But that was the 75hp, Euro 5 version of the engine.

My short-lived (ie written off) 2017 model and it’s 2018 replacement both struggle(d) to get over 52-55mpg averages across a range of conditions— but they are the 95bp, Euro 6 variants, which do seem to be a little thirstier. 70mph (shown on GPS, which is 75 on the speedo dial) is about 2800 rpm (which is ‘high’ for a diesel)

By the way, I see we’ve ’woken up’ a thread from 2022 in the past couple of days

My two 2012/14 4x4 diesels in the mid fifties, could make it better or worse, depending on traffic and driving style…….