The all new G30 5-Series based Alpina B5 sedan has been spied during tests on the Nürburgring where it was running some very quick laps.
Power will come from Alpina's version of the BMW 4.4L V8 twin-turbo and should top 600 hp (current F10 based B5 features 600hp / 590lb-ft). Like the current B5, it will also feature Alpina customized suspension, aero kit and interior.