The final "100" models, 1956's "BN4" (2+2 seats) and 1958's "BN6" (2 seats) were six-cylinder 100-6 cars.To  make room for the occasional seats the wheelbase was increased by 2" (50.8 mm). The bonnet had a built in air-scoop & the windscreen could no longer be folded down. The cars used a tuned version of the BMC C-Series engine previously fitted to the Austin Westminster, which at first produced 102 bhp increasing to 117 bhp in 1957.

Model expected to be released September 2008