BMW has stated several times that it has no plans to do an official M version

2011 Alpina B7 - Click above for high-res image gallery

BMW has stated several times that it has no plans to do an official M version of the current F01 7 Series, but that doesn't mean it won't offer a hotter version of its flagship sedan courtesy of Alpina.

At next month's Chicago Auto Show, BMW will be reviving the Alpina B7, and while the sweet 4.4-liter twin turbocharged V8 remains under the hood, the dial has been turned up from the stock 400 horsepower to a full 500 hp, along with 516 pound-feet of twist. That should be enough to catapult the big sedan to 60 mph in just 4.5 seconds.

By itself, big power is useless unless spend all your time at the drag strip and the 7 Series is capable of so much more. Handling has long been a BMW hallmark and the 21-inch, 20-spoke Alpina wheels wrapped in Michelin PS2 rubber should provide plenty of grip for directional changes and positive and negative acceleration. A deeper front air dam and a rear decklid spoiler help keep the car glued to the pavement at autobahn level velocities, while inside the B7 coddles its occupants in upgraded leather and wood trim.

The B7 goes on sale this spring in both standard and long wheelbase formats, although pricing has yet to be announced. Make the jump for all the details.