2012 BMW Z4

Turbos, as we've mentioned, are our friends. Soon, they'll be friends to base BMW Z4 owners, too, according to a recent tweet from Automobile Magazine. How soon? Later this year, according to the unsourced tidbit. It's slated to replace the base naturally aspirated 3.0-liter inline six-cylinder engine, and Automobile infers that that will equate to at least 200 horsepower output for the four-banger. While the tweet doesn't specifically mention a turbo, forced induction seems like the most likely way for BMW to reach the double-century mark, though the S14 engine in the E30 M3 did it with...