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Originally Posted by inline6
Are you sure that's less difference than in the e46 3.0 vs 2.5? What did they have different apart from cams/shafts? Would like to hear from anyone who knows the answer to this.
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The E46 had different displacement (engine is different) one is a 2.5 liter, the other is a 3.0 liter indicating a larger bore and/or stroke combination of pistons and crank shaft. The E90 models have the same engine, the difference is intake, exhaust, and software!