The 1955 Austin-Healey 100/4 BN1 is a landmark in British sports car history, named for its ability to exceed 100 mph—a rare feat in its era. Built from 1953 to 1955, it was the first of the legendary “Big Healeys” and the foundation of Donald Healey’s partnership with the Austin Motor Company. Powered by a 2660cc inline-four with a 3-speed gearbox and overdrive, the BN1 delivered both speed and refinement, wrapped in a low, sleek roadster design with a long bonnet and minimalist cockpit. With only about 10,000 produced, surviving BN1s are now highly prized by collectors for their scarcity, performance pedigree, and historical significance, representing the birth of an icon that shaped 1950s sports motoring.