AC Schnitzer, the well-known BMW tuning house, has earned the bragging rights for having the world's fastest street-legal diesel car. The German firm's BMW 335d-based ACS3 3.5d Coupe reached a top speed of 288.7 km/h or 180 mph at the 13 kilometer-long Nardo test track in southern Italy breaking the previous record set in 2006 by an additional 8.7 km/h.
The tuner did not release technical details on the specific model, but we assume that it features the standard 310HP upgrade to the twin-turbocharged straight-six diesel engine.
Together with the record breaking ACS3 3.5d Coupe, AC Schnitzer also tested the ACS4 3.5 turbo, which is based on the BMW Z4 sDrive 35i, at Nardo. The 360HP hardtop roadster achieved a top speed of 303.1 km/h or about 188 mph, which may not have set a world record, but it's impressive nevertheless.
