Just the taxes alone on the M135I is much more in Norway than the total price of 118I out of the dealership.
The base 118I costs more here than base M135I in UK..
"Norwegian PRICE" x "0.13564 = EURO
Everything above 178hp, and 165g CO2 gets expensive very fast! And even a lower powered car gets a lot of taxes..
EDIT:
Actually 116I is more expensive here than M135I in the UK!