Another thought…
You have not said what your journey is like, what speeds do you travel at? Is it urban slow traffic or motorway? That will also have a big impact on range. Speeds over 50mph reduce range as wind resistance increases, power conversion is less effective and you get no input from regen braking. At slower speeds with stop start driving the range will increase.
The car also adjusts the projected range based on the previous trips and driving style. You can reset the range, there is a thread about how to do it somewhere on here, have a look for it. Also have you actually tried to get over the range shown or just not tried? I find the range to be pessimistic and as you drive it can extend or not go down as quickly as first predicted, therefore going further than expected
Overall something about the OP posts just do not ring true. For someone with £50k+ to spend they seem inexperienced and naive. Very little info provided, unable to string a sentence together, badly typed and not really interested in the answers to the questions they asked.
Question 1 was - “have we got 2 bad cars or is this the average ?”
Answer - at the moment in the cold winter months people are getting around 100 miles of range on a full charge. That is a fact, just look at the posts on other threads.
Question 2 was - “Has anyone got anywhere near the mini’s quoted 145miles ?
Answer - Yes, in warmer weather when you don’t need heating or A/C it is very possible to get the quoted 144 miles if you avoid speeds over 50mph. In fact you can probably get more than 144 if you are a gentle driver.
I still don’t know why they have not contacted the salesman who sold them the cars.
If the questions are for real, tell us more, what cars, models, colours, journey, driving style, etc, etc. Post a photo of the cars together. How old are you? 18, 30, 50, 80, we have no idea from the info provided. I’m thinking 18 from the posts and inexperience at buying cars, but then where would an 18 year old get £50k?
As you can see I’m enjoying this thread, I feel like Miss Marple trying to get to the bottom of a mystery 😂😂😂