While Audi is chopping down its V8 and V10 engines, BMW may actually take a hatchet to a four-cylinder. In an effort to reduce emissions, the 2012 1-Series may use a turbocharged three-cylinder engine to replace the 2.0-liter unit in the international lineup. This doesn't have an effect on North America because the 1-Series only comes in 3.0-liter form.

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