The bulk of the upgrades are found under the hood, where AC Schnitzer has installed a triple-turbocharged 3.0-liter diesel-burning straight-six borrowed from the much bigger BMW 550d. The six was tuned to generate 400 horsepower and 591 lb-ft. of torque, an increase of about 20 ponies and 45 lb-ft over the stock 550d. As a result, the 150d reaches 62 mph from a stop in a brisk 4.5 seconds.
The extra power is complemented by a comprehensively redesigned suspension, new bumper with three large air dams tasked with keeping things cool in the engine bay, side skirts, carbon fiber mirror caps, and a roof-mounted spoiler. The 150d rides on massive 20-inch alloy wheels, though buyers looking to keep a low profile can order smaller 18- or 19-inch units.
Pictures of the cabin haven’t been published yet, but AC Schnitzer promises it has added a custom shift knob, an aluminum cover for the iDrive controller knob, special floor mats, and aluminum pedals.
The 150d isn’t a one-off design study built for the auto show circuit. Customers interested in owning a 5 Series-powered 1 Series are invited to contact AC Schnitzer for additional information such as pricing and information. It goes without saying that the 150d isn’t street-legal in the United States.