I'm getting similar figures but with a combination of motorway and A roads (think the best I had was 271). Had mine for 3 weeks and driven 1600 miles with an average of 3.2 kw/mile from new. Getting more range than expected so battery definitely likes mild/warm weather so I'm expecting this to drop around 20% in the winter. I find that the range prediction on navigated routes is quite pessimistic (which is not a bad thing) and quite often end up with 20+ more miles left on longer journeys. Not sure if BMW navigation takes into account the weather temperature or not.
As a bonus I've recently moved onto an EV tariff with Octopus Energy with 5 hours per night of cheap electric. My wife and I both have electric cars a so a real no brainer. Majority of my IX40 miles are costing less than 3 pence per mile vs 30 pence per mile on my previous X5 at current fuel prices!!
As a bonus I've recently moved onto an EV tariff with Octopus Energy with 5 hours per night of cheap electric. My wife and I both have electric cars a so a real no brainer. Majority of my IX40 miles are costing less than 3 pence per mile vs 30 pence per mile on my previous X5 at current fuel prices!!