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5Alpina B5 Biturbo sedan looks the M5 square in the eyes

Do you love the notion of the 507-horsepower, twin-tubocharged Alpina B5 Touring, but just can't get behind a high-performance family wagon? Alpina has good news for you. The company has officially pulled back the curtain on the new B5 Sedan, and the vehicle boasts the same wicked driveline as its long-roof twin. That means there's a dizzying 516 pound-feet of torque pouring out of the same forced-induction 4.4-liter V8. A ZF eight-speed automatic transmission takes care of gear-swapping duties

4Alpina teases BMW B5 Bi-Turbo ahead of Goodwood debut

The Alpina B5 has been spotted a couple of times and seen front and back, so it's pretty clear what we'll be in for. However, before the car's official unveiling at the Goodwood Festival of Speed in July, Alpina has released a sketch of what will be one of the hottest 5ers that doesn't begin with an "M." There will be two turbos stuck to the engine lurking behind that highly slatted front end, and we're told that "there will be an eye towards fuel economy with this car." But presumably, just one

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