The line between supercar and sedan is beginning to get extremely blurry with Alpina's new B7 sedan, based on the new BMW 7-series. Taking the mantle of fastest production sedan in the world, the B7 improves on the 7-Series with a 4.4-liter twin-turbocharged V8 with 600 horsepower and 590 lb-ft of torque. This is enough to push the B7 from 0-60 in just 3.5 seconds and to a top speed of 205 MPH — numbers which are in supercar territory. The increased power comes from improved turbocharger internals and tweaked engine management software. Alpina has also improved the driving aids, adding a Sport+ mode that adjusts the dampers and lowers the ride height by half an inch at the press of a button. The ultimate version of the 7-Series arrives later in 2019 in Alpina's signature blue and multi-spoke wheels.