Originally Posted by elstoof
You can definitely get more power from the engine, it's the same unit as the one in the 328i. Standard 125i puts out 163kw and 310nm, the x28i is in 180kw and 350nm tune for sub 6 second 0-60 in the bigger and heavier 3 series. Have a google for N20 tuning and see what you find.
I had a look. Seems like 45hp+ and 60Nm+ on JB tune.
But they only talk about the 328i and in stock it can do 0-100 in 5.6s?? Tuned 4.9s.
Why does the lighter 128i only does it in 6.4s in stock?
Then i saw a video of the 135i, and the engine sound is just so much better!