When it comes to open-top sports cars, some of the most engaging to drive come from Germany. From the Porsche Boxster to the more budget-minded Audi TT, this breed of automobile is well-represented in the nation. Those after a great drive will do well not to look past the BMW M division though, as it has cooked up some right weapons over the years. The Z4 M is one of the best examples of this, though the first was the Z3 M Roadster.
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