The PB was a major styling revision, completely eliminating the tailfins, with a flat bonnet and generally more conservative styling taking its cues from the Victor FB introduced the previous year and with which it shared its doors. The engine was the same straight six as the last of the PA series and although the compression ratio was increased to 8.5:1, power output remained at 95 bhp. Front disc brakes were now fitted as standard. In October 1963 an estate conversion was made available, the work carried out by Martin Walter Ltd. of Bedford Dormobile fame and fully approved by Vauxhall. The conversion featured a steel-framed glass fibre roof extension and tailgate. The rear doors with squared-off window frames were straight from the factory-built Victor estate. In October 1964 the engine was increased in capacity to 3293 cc by virtue of a larger, 92 mm, bore in combination with the original 82.55 mm stroke. Power increased to 115 bhp at 4,200 rpm. The model received a new full-width chrome grille incorporating the headlights and there was a full-length chrome strip along the body sides.