The McLaren 675LT sold out in a matter of months so it comes as little surprise the company is working on a roadster variant.

The McLaren 675LT sold out in a matter of months so it comes as little surprise the company is working on a roadster variant.

Recently caught undergoing testing, the 675LT Spider follows in the footsteps of the coupe and should feature a number of modifications including stiffer springs, a recalibrated seven-speed SSG transmission, and a revised electronic stability control (ESC) system.  The model should also benefit from a number of weight saving measures that enable it to be approximately 100 kg (220 lbs) less than the 650S Spider.

Like the coupe, power will be provided by an upgraded twin-turbo 3.8-liter V8 engine that develops 675 PS (666 bhp / 496 kW) and 700 Nm (516 lb-ft) of torque.  It enables the coupe to accelerate from 0-60 mph in 2.8 seconds before hitting a top speed of 205 mph (330 km/h), so expect the Spider to post similar numbers.

The McLaren 675LT is expected to be introduced sometime next year.  It will eventually be joined by the 570 GT and the 570S Spider which is slated to be launched in 2017.

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McLaren 675LT Spider spied, could be introduced next year