September 2, 2011 Alpina previews its B6 Bi-Turbo Cabrio based on the BMW 6-Series Edit Delete Tags Autopost German BMW tuner creates a powerful twin-turbo 6er cabriolet with 507 PS (373 kW / 500 bhp) and 700 Nm (516 lb-ft) of torque. Source: http://feeds.worldcarfans.com/~r/worldcarfans/Jxfz/~3/a89WacExV3o/alpina-previews-its-b6-bi-turbo-cabrio-based-on-the-bmwJuan Manuel Fangio Nino Farina Walt Faulkner William Ferguson Maria Teresa de Filippis