Quote:
Originally Posted by Razor2010
Yes, but the USA G20 330i (and probably the global G20 330i) comes with the B46TU / B46 which does NOT have the same internals as the B58TUs. That would be the B48TU / B48 that has the upgraded crank, pistons and bearing(s). But you are correct, it does share the same compression ratio at 10.2:1. They dropped it from 11:1 to 10.2:1 from the B58 to the B58TU for the M340i and increased the boost to achieve the significantly higher HP and TQ over the previous B58 / 340i.
Am I wrong here or are the internals of the B46TU and B58TU the same (outside of the extra litre in size), and the B48TU actually has stronger internals than the B58TU? Honest question.
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You are referring to the B48A20T1 found in x2 35i and m135/m235i, and yes it seems to have more solid internals than B58TU. Though i would think this engine is developed to acheive up to 400hp in later configurations. The B48/46B20O1 has got a forged crankshaft and many technical updates as to the old B48.