Famous BMW tuner Alpina has been caught testing its upcoming B4 model on the track.
The B4, which will be based on the BMW 4-Series coupe, features the same bi-turbo engine found under the hood of the B3 sedan, which was unveiled at this year’s Geneva Motor Show. The B3 Bi-Turbo features a 3.0-liter, twin-turbo straight-six engine with 410 hp and 442 lb-ft of torque.
The Alpina B4 will also get the standard treatment all Alpina models get, including an aerodynamic body kit, wheels and suspension. There might also be a chance that the B4 will offer an all-wheel-drive variant.
The Alpina B4 is expected to make its debut at the 2014 Geneva Motor Show.
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