Open 4-seater.

The hairy one. Also known as the Tigress or the B-type, the 18/100 was the road racing derivative of the 18/80, using a tuned version of the ohc engine. A new camshaft, crank and pistons, cross-flow cylinder head with dual ignition and a dry sump were used, and chassis modifications included an additional pair of dampers at the rear, increased fuel tankage, modified braking system and flattened springs. At £895 it was extremely expensive (and heavy at 271/2cwt), but there was 110mph capability. Never fully developed by the works, as the M-type Midget showed greater handicap potential at the 1930 Double Twelve race.