Black Adder 6 is a Bentley Special, based on a 1947 Mark VI. It was equipped with a 4.9 litre straight-six motor. A "special" in British motoring parlance is an "one-off" design using components of an existing vehicle that is intended to test the limits of the original design and are often intended for competition.

The Black Adder 6 took its design from many vintage Bentley's such as the Napier-Railton Special and the Old Number 1. It was equipped with a large 4.9L straight-six engine. In 2011, it achieved a first-in-class at the British Invasion XXI and first at the Concourse d'Elegance in the British Invasion XXII.

In 2011, the Black Adder 6 achieved a 1st in class at the British Invasion XXI and in 2012 it was awarded 1st in Class in the Concours d'Elegance at British Invasion XXII.