I anticipate diesel prices will sky rocket soon making the MP£ a very different comparison!
We thought this when looking for a replacement for our Ford Kuga. We had ordered a Vauxhall Grandland X, but Vauxhall changed the spec for the 2019 model of the vehicle we ordered, making it not such a good deal. So now we've ordered a Mazda CX5 with a petrol engine. This should give the same cost per mile as our current Kuga.