The 100 M “Le Mans” was introduced in 1955 as a higher-performance version of the Austin-Healey BN2, featuring larger carburetors and a high-lift camshaft, as well as high-compression pistons and a number of other upgrades that increased engine output from 90 to 110 horsepower.

It was also equipped with an upgraded anti-roll bar and a louvered bonnet secured by leather straps.

While some BN2s were retrofitted with performance parts to obtain 100 M-like performance, only 640 examples of the 100 M were built by the factory in 1955 and 1956, making them among the most sought-after of British sports cars and cherished by the few lucky enough to own one.

This 1956 Austin-Healey 100 M “Le Mans” is a factory-built example completed on 12 April 1956 and delivered new to the United States.

The car was purchased in the late 1960s and remained under single-family ownership over the next five decades.

In the 1990s, the family treated the car to a multi-year rotisserie restoration.

Accompanyi...