Stop teasing us Porsche, just reveal it please! Oh, and make sure it's got a flat-six in the middle...

The Porsche 718 Boxster Spyder has been spied once again, ahead of an anticipated reveal in the coming months.

It's almost like Porsche wants to give the car's overall design away now – there's next to no camouflage on this prototype, though the entire vehicle is finished in black.

We can see a more aggressive body kit compared to 'standard' 718 Boxster models, including an upgraded wheel and tyre package concealing massive brakes with yellow calipers.

Also distinguishing the Boxster Spyder from lesser models is its flying buttress-style rear deck, and the unique design of the fabric roof. The rear diffuser is also meatier, and the tailpipe arrangement has a wider gap between the two outlets than the central arrangement of other 718 Boxster models.

It's believed the 718 Boxster Spyder – and its hard-topped 718 Cayman GT4 twin – will draw power from a detuned version of the 4.0-litre naturally-aspirated flat-six engine used in the 911 GT3, reported to make around 320kW. By comparison, the 911 GT3 makes 373kW.

Should that turn out to be true, the 718 Boxster Spyder and 718 Cayman GT4 will be the only variants in their respective line-ups to feature a naturally-aspirated engine, and six-cylinder engines, given the core range has made the switch to four-cylinder turbocharged units.

Reports have also suggested the pair will continue to offer both a six-speed manual and optional PDK dual-clutch automatic.

Timing is still to be determined at this stage, though the prototype looks close to production ready. We'd wager Porsche is planning to reveal both the Boxster Spyder and Cayman GT4 very late this year or early next.

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