Development work continues on the 2016 / 2017 BMW 5-Series as our spies have caught a prototype undergoing cold weather testing near the Article Circle.

Development work continues on the 2016 / 2017 BMW 5-Series as our spies have caught a prototype undergoing cold weather testing near the Arctic Circle.

Dressed in heavy camouflage, the model has an evolutionary design that mimics the 2016 7-Series. Unfortunately, we can't see too many details but there's a dual exhaust system and a slightly larger grille.

Little else is known about them model but it is expected to ride on the "35up" platform that uses a combination of aluminum, carbon fiber and high-strength steel. This could enable the car to weigh up to 220 lbs (100 kg) less than its predecessor.

Under the hood, we can expect an assortment of petrol and diesel engines. Nothing is official but the range is expected to include everything from a 1.5-liter three-cylinder diesel with 150 PS (110 kW) to a twin-turbo 4.4-liter V8 engine that develops up to 600 PS (441 kW).

There will also be a plug-in hybrid variant that has a turbocharged 2.0-liter four-cylinder petrol engine, an electric motor and a lithium-ion battery. This will enable the model to produce a combined maximum output of 245 PS (180 kW) and 400 Nm (295 lb-ft) of torque.

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2017 BMW 5-Series spied near the Arctic Circle