BMW is bringing in the BMW Alpina B7 into the US market, with the model set to be on show during the 2007 Chicago Motor Show this month. Alpina, an official BMW tuner, has taken the BMW 7-Series and fitted it with BMW’s 4.4 litre V8 engine. Of course, it wouldn’t do justice leaving the engine stock, so Alpina tweaked it with a supercharger, resulting in a monster V8 that makes 500hp at 5,500rpm, and 700Nm of torque at 4,250rpm. Horsepower matches the new E60 M5’s 5.0 litre V10 but kicks in at a much lower rpm, and the force blown motor beats the E60 M5’s torque figures by 120Nm. Clad in a nice trademark Alpina blue, the big luxury saloon goes from 0-100km/h in only 4.8 seconds, only a fraction slower than the E60 M5’s 4.7 seconds.

Of course, to match the sweet engine, you get Alpina sport-tuned suspension with Active Roll Stabilization, an aerodynamically designed bodykit to help with high speed handling as well as huge 21 inch wheels with Z-rated speed performance tyres.

More photos after the jump, and enlarged versions are viewable by clicking each photo.