2012 BMW Z4 sDrive28i First Drive: Four-Cylinder BMWs Are Baaack

BMW?s return to four-cylinders in the U.S. market proves painless. Any new engine is big news to us, but when a new powerplant comes along and replaces one of our favorite engines?BMW?s naturally aspirated inline-six in this case?we pay extra-close attention. This fall, the base Z4 and 5-series won?t have the perfectly demure and smooth-revving [...]

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