I was looking at buying a BMW 3 series Ci...probably a 2001, and there's a decent price difference between the 325 and 330. I know the 325 has a 2.5L engine and the 328 has a 2.8L. I understand how the models differ in engine size, but is there really a noticeable difference in power between the 325, 328, and 330? Is that extra half liter really worth it??
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