Connaught was founded by Rodney Clarke and Mike Oliver. The team's first single-seaters appeared in 1950 as Type A Formula 2 cars. Their engine was developed from the Lea-Francis unit used in the team's earlier sports car programme and was substantially re-engineered to the point of being regarded as a genuine Connaught design. The cars used a preselector gearbox and a de Dion rear axle. Because the 1952 and 1953 World Championship seasons were run to Formula 2 regulations rather than Formula 1, the Type A was eligible to compete in championship rounds during those two years.
Notable drivers who raced the Type A in championship events included Stirling Moss and Prince Bira.
For the 2.5-litre Formula 1 that came into force in 1954, Connaught designed the Type B. The car was originally intended to use a rear-mounted Coventry Climax V8 engine known as the Godiva, but when that engine project was abandoned, Connaught substituted an Alta engine enlarged to 2.5 litres. The first Type B cars wore all-enveloping aerodynamic bodywork inspired by contemporary streamliner thinking, but the cars were later rebuilt with conventional open-wheel bodywork.
In 1955, at the non-championship Syracuse Grand Prix, Tony Brooks drove a Type B to victory. The result was historically significant: it was the first time a British driver in a British car had won a Grand Prix since 1923. The winning car subsequently became known as the Syracuse Connaught. Drivers who raced the Type B in the World Championship included Stuart Lewis-Evans, alongside the team's founder Kenneth McAlpine, who also raced as an entrant-driver.
In 1958, Bernie Ecclestone was listed as a driver-entrant for Connaught at the Monaco Grand Prix, though he failed to qualify.
In 1962, Jack Fairman made an attempt to qualify for the Indianapolis 500 in a Connaught-entered car but was unable to achieve the required speed to make the field.
Prior to and alongside the single-seater programme, Connaught built a small number of sports car models. Road-going cars were produced as the L2 and L3, based on the Lea-Francis Sports chassis. The team also built three examples of the cycle-winged L3/SR Sports Racer and two further competition models — the ALSRs — built on the A Type Formula 2 chassis.
In 2004, a separate entity called Connaught Motor Company revived the Connaught name for new road cars: the Type D Syracuse and the Type D-H hybrid sports car. The Syracuse name deliberately echoed the historic 1955 victory that had made the original team's reputation.
Across its Formula One entries, Connaught Engineering scored 17 World Championship points in 18 Grands Prix, with one podium finish to its credit. The team's most lasting legacy is the 1955 Syracuse Grand Prix result, which stands as a landmark in British motorsport history.
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