I can't really tell the difference between the 328 and the 330 when driven back to back (although the 325 feels noticably slower than the 328).
On paper:
0-60 is 6.7, 6.3, 6.1 for the 325, 328, 330.
Not much acceleration difference between 328 and 330, in spite of the
HP numbers: 215, 230, 255
Torque: 185 200, 220
BMW is traditionaly pretty conservative with their numbers. Makes me wonder if they keep the 328 numbers low to make the 330 and 335 look better.
bottom line, 328 and 330 accelerate pretty much the same with a stick.
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