The largest and most powerful Bugatti at the time. Ettore Bugatti planned to build and sell 25 units, but the Great Depression got in the way; only 7 were made, and 3 were sold. In 1933, Bugatti repurposed the unused lot of engines for a newly constructed railcar. 79 were built for the French National Railway SNCF, using a further 186 engines, the last of them remaining in regular use until 1958. One of the railcars took a world average speed record of 122 mph (196 km/h) for 43.9 miles (70.7 km).
