2012 BMW Z4 sDrive28i benefited 4-cylinder engine with the new U.S. linep. 2012 BMW Z4 sDrive28i The plan will go on sale this fall, and will replace the BMW Z4 models sDrive30i. 2012 BMW Z4 sDrive28i using the new 4-cylinder engine capable of producing 240 HP at 5000 RPM and maximum torque reached 260 lb-ft [...]