The wheels are one of the first things you notice when checking out the 2015 BMW Alpina B6 xDrive Gran Coupe. The 20-inch aluminum alloy rollers have 21 spokes that spray out from their hubs, creating one of Alpina's signature design features. But there's also plenty of function to go along with the stylistic form of this hotted-up BMW 6 Series Gran Coupe.
If you're in the market for a high-performance BMW and you live in Europe, you've typically had two range of options at your disposal: you could go for one of BMW's own M models, or turn to Alpina. Though technically independent of BMW, Alpina is about as close to the manufacturer as a tuner can get, and many of its models are offered through BMW's own dealer network.