Alpina has a rich, 50-year history with BMW. The pair have built some of the most impressive luxury and performance vehicles ever to roll off a German assembly line. Unlike aftermarket tuners that begin work with a finished production car, Alpina works directly with BMW inside its factories to build specialty vehicles for the most picky of customers. The pair’s latest products are diesel-powered 4 Series coupe and convertible. Starting with the bones of the 4 Series, Alpina juices up the 3.0-liter, bi-turbo, inline six-cylinder to make an impressive 350 horsepower and 516 pound-feet of torque. Sadly, the oil-burner is not available in U.S.-spec 4 Series BMWs. Those across the pond will enjoy the benefits of diesel, getting more than 44 mpg on the highway. The added grunt to this twin-turbo beast means sub five-second zero to 60 mph times.
Alpina didn’t just make the D4 Biturbo faster. Added to the running gear are auxiliary springs with thicker anti-roll bars and adjusted camber and toe-in settings for the Alpina-specific wheels and Michelin Super Sport summer tires. The car already makes use of electronically controlled dampers that give the driver adjustability in the suspension. BMW’s limited-slip differential helps put power to the ground.
Click past the jump for more on the BMW Alpina D4 Biturbo.