The 2014 Alpina B4 Biturbo Coupe has been spied at the Nürburgring. It likely has a twin-turbo 3.0-liter straight six engine that produces 410 HP (310 kW) and 600 Nm (442 lb-ft) of torque.

The 2014 Alpina B4 Biturbo Coupe has been spied at the Nürburgring.

Caught in BMW's Nürburgring parking lot, the lightly camouflaged model has an aerodynamic body kit with modified bumpers and a trunk-mounted spoiler. We can also see high-performance brakes (with Alpina-branded calipers), a four-tailpipe sports exhaust system and special alloy wheels.

There's no word on specifications but, if the B3 Biturbo is any indication, we can expect the coupe will have a twin-turbo 3.0-liter straight six engine that produces 410 HP (310 kW) and 600 Nm (442 lb-ft) of torque. This enables the rear-wheel drive sedan to accelerate from 0-100 km/h in 4.2 seconds, so expect the coupe to be a tad quicker.

The Alpina B4 Biturbo Coupe could be introduced at the Geneva Motor Show but nothing is official as of yet.

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2014 Alpina B4 Biturbo Coupe spied at the Nürburgring