Insider: BMW Alpina B7 gets 507HP Twin-Turbo V8, Debut Set for Geneva

Auto Cars 2011's insiders have learnt that the all-new Alpina B7, a souped-up version of BMW's latest generation 7-Series sedan, will make its global debut at the Geneva Motor Show in March. Furthermore, we also managed to find out that the 2009 Alpina B7 will use a modified version of BMW's 4.4-liter twin-turbocharged V8 engine delivering around 507HP, or 7HP more than the previous B7 that was fitted with a supercharged 4.4-liter V8. While Alpina has yet to release any official details or pictures, a teaser sketch of the new B7 was leaked into the internet in December 2008, giving us a first glimpse of the sport sedan.