Background
Rover’s range topping P5 would be discontinued in 1973 to make way for the very modern P6. Despite this, Margaret Thatcher’s historic arrival at 10 Downing Street in May 1979 as the UK’s first female Prime Minister was enjoyed from the back seat of a P5B. The P5 had done sterling ministerial service during its life, providing formal transport for Thatcher’s predecessors Harold Wilson, Edward Heath and James Callaghan. When the Government Car Service were informed of the P5’s imminent demise they procured a batch of end of run vehicles from Rover and put them in storage for future ministerial use. As such it wasn’t a heavily used P5B that Prime Minister Thatcher rode in, but rather a pristine “new old stock” 1972 example retrieved from secretive Government storage.
The original concept for the P5 was as a small and light version of the P4 with a target weight of less than 22cwt (1120 kg) and capable of delivering a competitive 30 mpg. An early interpretation of the yet to arrive “compact executive” class, in essence. Life got in the way, however, and Rover decided that a high volume, low profit car was not right for them. A complete about turn saw the P5 morph into a low volume, high profit model that could take on the Jaguar MKVII on equal terms.
The David Bache design that finally took to the stage at the 1958 Earls Court Motor Show was indeed a big and bold luxury saloon. Its weight had ballooned to 32cwt and despite its 3-litre, straight six 115bhp propulsion performance was…. leisurely. In 1960 Autocar recorded a 17.1 second 0-60mph time in a MKI car. There was much else to admire, however, with Bache’s “private members’ club” interior being a revelation and entirely in keeping with the car’s impressive refinement and pillowy ride. This was no antiquated throw back of a car either. It was Rover’s first monocoque design, featured alloy opening panels, and in 1967 was the first Rover to feature the iconic 3.5-litre V8 engine developed from the Buick 215 unit. The V8 was a whopping 90kg lighter than the straight six and delivered a robust 158bhp. At last the P5 had an engine worthy of it and a “B” suffix was added to the P5 nomenclature in honour of the new Buick derived motor.








