118d vrs A2 TDI
Actually BMW have ssen the light and now introduced the stop start system that also featurs on the 1.2 TDI Lupo and A2.
So mpg is actually better than a Prius!
But if you want a BMW diesel why not test drive the 335d?!!!
If too much money then an old 330d is not far off for fun warp factor 5! There were 2 ex police armed response ones on ebay for £7k recently