Automobile Magazine has recently posted interesting info on Twitter. Basically, it states that the base BMW Z4 is likely to get a new turbocharged 4-cylinder engine instead of the current naturally-aspirated 3.0L inline-six. This comes as confirmation to one of BMWs previous announcements, according to which, 4-cylinders are going to return to its US lineup.
Another automotive resource, ZPost Forum, is claiming that the BMW Z4 family will soon be extended with two turbo 4-cyl versions - sDrive20i and 28i. According to the same sources, the 4-cylinder engine will be a 2.0L unit good for 174-hp and 235-hp.