Nice as it may be, the BMW 6 Series convertible doesn't really make our heart beat any faster. It's a soft, plush open-top tourer, and though the 4.4-liter twin-turbocharged V8 underhood certainly doesn't skimp on the power, it doesn't really make for an enthusiastic driving experience.

Enter Alpina, the BMW tuning house that has given us the 7 Series-based B7 here in the United States, not to mention creations like the B5 abroad. Like the rest of its work, the appropriately named B6 Biturbo Cabriolet adds more power to the 650i engine – 507 horsepower and 516 pound-feet of torque, compared to 400 hp and 450 lb-ft in the standard car. What's more, the suspension geometry gets tweaked slightly, and the car features new styling touches like a more aggressive front fascia, Alpina's iconic blue paint, and – of course – the tuner's signature 20-spoke wheels.

Nice, yes, but we think we'll stick to the B5 wagon that bowed in Geneva back in March. Still, see the B6 for yourself in our attached high-res image gallery.