I try and look at mpg over the full tank, in doing so that would average out the best and worst of the XC40 fuel figures. I think we can say that real time figures at best is 42mpg (15.5p mile) and worst is 26mpg (25p per mile) when fuel is 142.99 a litre. Electricity can may give at best 27miles in summer (13p mile) and worst in winter at 2Deg 16.5 miles (21p mile). I did a trip tonight from my town in Shaw to M606 turn off for Leeds Bradford Airport, recharging battery from zero to 12 miles on route with mpg indicated at 30.4, I then swapped to Pure Eco and drove the next 9 miles on battery, mpg as expected then rose up to 38, with 1 mile indicated left in battery. It would seem there’s no definitive fuel / electricity is cheaper, type of driving and certainly temperature conditions dictate which will give a better return for the cost. But thanks for pointing out the Pure Eco mode, I just never switched to it, thought hybrid everyday use would be the mode of choice as the car defaults to it after stopping and powering off.I've never used the charge option. I also give no credence to the range readout. I've had it increase by 2 miles just turning the car off and on again and then reducing by 2 miles in a few hundred yards.. During the journeys there was the usual electric consumption and regeneration in the app trip details which generally cancelled each other out. Temperature has a big effect on petrol consumption too. With a cold engine a 2 mile trip to the shops recorded 20.4mpg, whereas the return journey 15 minutes later recorded 27.7mpg.
I’ll be charging more when the temperature rises above 10Deg and see what results this returns 👍