From Fall 2011: BMW Z4 sDrive20i and sDrive28i with N20 instead of six-cylinder
arting September 2011, the BMW Z4 Roadster goes through some changes under the hood. BMW Z4 sDrive20i and sDrive28i with N20 instead of six-cylinder
US Debut: BMW Z4 sDrive28i 4-cylinder in Atacama Yellow
As anticipated by BMWBLOG, the first four-cylinder BMW to return to the United States is the Z4 sDrive28i Roadster.
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