<p>BMW first modern roadster was the Z3. In 2002, when the second-gen version was born, its model number ticked up one, to Z4. That redesign also saw the two-seater slapped with the heavy hand of BMW's "flame surfacing" styling treatment. A third-gen model that arrived for 2009 toned down the wild sheetmetal creases and stretched out the proportions to create a much prettier sports car, but the switch to a retractable hardtop added weight. A six-cylinder version of that 2009 model&nbsp;<a href="http://www.caranddriver.com/comparisons/second-place-page-4" target="_blank">came in second</a>&nbsp;behind the Porsche Boxster in a <em data-verified="redactor" data-redactor-tag="em">Car and Driver</em> comparison test that also included the Audi TT roadster and the Chevy Corvette convertible. In recent years, two six-cylinder versions were offered (topping out at 335 horsepower), along with a turbo-four base model. But the market for roadsters is a tough one, and volumes are small. Which is why the model's Z5 successor will come via joint effort, with Toyota.&nbsp;<em data-redactor-tag="em">—Joe Lorio</em></p>

bmw z4

BMW Z4 Production Has Reportedly Ended

The Z4 is ending production, likely to make room for the Toyota-BMW sports car collaboration.

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