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