Background
If a mainstream motor manufacturer launched a small utility car with a rear-mounted highly advanced engine in 2021, car buyers wouldn’t know what to make of it. The chances of it succeeding would be slim to say the least. But this is exactly what the Rootes Group did in 1963.
Designed as a rival to BMC’s 1959 pace-setting Mini, the Imp employed a layout unused by British manufacturers until this point, and managed quite a number of other firsts too. The water-cooled four-cylinder engine was based on the Coventry Climax FWMA fire pump engine, featuring an all-aluminium alloy construction, and an overhead camshaft.
This was mated to an all sychromesh four-speed alloy transaxle, an advanced combination in 1963 (Mini designer Sir Alec Issigonis had recently described the fitting of synchromesh on all forward gears as ‘impossible’.) The engine was canted over at a 45° angle to keep the centre of gravity low and optimise road-holding.
Rootes built a new plant in Linwood, Scotland to build the new car and press reaction was very favourable. Its image was further enhanced in 1965 when competition success in the form of a Tulip Rally win came courtesy of driver Rosemary Smith. This led the Rootes Group to produce a special rally converted Imp under both the Hillman and Singer marques, known as the Imp Rallye.
In 1966, after winning the Coupe des Dames, Smith was disqualified under a controversial ruling regarding the car’s headlamps, but the Imp was also successful in touring car racing when Bill McGovern won the British Saloon Car Championship in 1970, 1971 and 1972.
Despite all this, the car suffered from reliability problems and was costly to build. Rootes was taken over by Chrysler Europe in 1967 and production ended in 1976 after around half a million had been built over its 13 year lifespan.







