[Phippsy81]

The M Sport Diff is an option on the 330i in the UK, I have it on mine...
Having moved from a F32 435d to the 330i, which was the biggest engine available when I got it, I was worried I would miss the power and torque of the 6 pot diesel!
Whilst there is a notable difference in power and acceleration between the two cars (1.1s 0-60 off book), I'm not disappointed with the 330i at all, and overall much prefer it over the F32.
I did choose to spec the car with most things bar the Visibility Pack, but even then it still would come in circa £3k under a Base M340i.

I would definitely consider the M340i/M3 in the future, but the 330i is plenty of car for daily driving, reasonable economy and punchy enough to have some fun too, but even with a stage 1 map it wouldn't be in standard M340i territory on power/acceleration.

If you want the power and have the cash, go for the M340i, but if you want very good performance with a lower price point for initial outlay and overall day to day running costs, the 330i is a great option 👌🏼