Last time we reported about BMW's long-rumored family of turbocharged 4-cylinder engines, it was in the summer of 2010. Meanwhile, the German manufacturer hasn't revealed anything on the matter, giving the whole affair an almost mythical status.
However, a new rumor has surfaced, with Automobile Magazine tweeting that the entry level BMW Z4 will soon get a new, 4-cylinder force inducted engine, as a replacement for the naturally aspirated inline-six.
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