The next-generation BMW Z4 has been scooped driving in and around the Bavarian automaker’s central offices in Munich. If you check out the spy shots you can see that the prototype is equipped with a hardtop, and from the looks of it, it’s a two-piece folding metal roof. So do we need any more proof that the new Z4 will indeed be equipped with a retractable hardtop instead a conventional, but lighter soft top like today’s model?

If it were any other automaker we’d say no, but since BMW is known to explore various solutions on its prototype test cars, we wouldn’t be too hasty to completely write off the canvas top. Who knows, maybe the Bavarian's will go both ways as Mazda did with the current generation Miata / MX-5. Leaving the roof options aside, the new Z4 will be built on the latest 3-Series underpinnings, remaining similar in dimensions to the current model growing on an inch or so in length and width. While the styling is reminiscent of its predecessor, the new Z4 appears to have a more aggressive stance. -Continued

Under the hood, we’ll see the new Z4 getting the latest powertrains from the 3-Series including BMW’s latest generation 3.0-liter bi-turbo straight six that develops 326 HP in the new 740i (from 306 HP in the 335i) and the M3’s 420 HP 4.0-liter V8 in the range topping Z4 M model. Just like the current Z4, the new Bavarian roadster will also be offered (at least in Europe), with an entry-level, no-frills 2.0-liter 4-cylinder engine.

So when will we see the new Z4 arriving in BMW’s dealerships? Our sources report that the production BMW Z4 will make its first appearance at the Detroit Show in January 2009, but we wouldn’t be surprised if the Bavarian automaker presents a pre-production model the Los Angeles Motor Show this November. In any case, the new Z4 that will be made in Germany instead of the U.S. like the outgoing model will be available worldwide from spring 2009.

Photo Copyright: AR