In an attempt to expand the appeal of the Berkeley a four-seat version, achieved by lengthening and widening the basic shell, was introduced and called the Foursome. Although powered by the same 492cc engine that was proving very popular, the Foursome failed to attract the buyers and only 17 were built.
 

In terms of out and out performance the Royal Enfield powered B95 and B105 cars, introduced in 1959, were the best yet. Producing over 40 bhp (and 50 bhp for the B 105) and bags of torque, the twin cylinder four strokes could rocket the Berkeley to over 100 mph if the intrepid driver had the nerve. In October 1959 the rarest of the production cars were launched - the “Q” cars. These were Q and QB versions of the B95 and B 105. These larger bodied cars were commensurate with the 1958 Foursome bodies, The Q models were occasional four-seaters, the QB models were described as “roomy two-seaters” with extra luggage capacity.

Although around 2,500 four-wheeled Berkeley’s were produced by far the most well remembered, and now most common version, was the three-wheeled T60. Conceived as a basic model and employing the 328cc Talisman twin engine, the T60 was an overnight success and held great appeal for the ex-motorcyclist looking for car type transport powered by an engine/transmission he was familiar with. A 2+2 version the T60/4 was developed for the small family and was launched in September 1960.

Throughout their short career Berkeley’s built up an enviable reputation in the field of competition. On rallies, driving tests and full-blown racing circuits the little Berkeley’s defied all attempts by the handicappers to keep them from the front. Superb brakes, leech-like roadholding and chuckable handling ensured what they lost on the straights they rapidly made up on the corners. International recognition came from the string of successes achieved by Count “Johnny” Lurani’s team of 492 cc cars at Verona, Monza and in the Mille Miglia.
Financial pressure from unsympathetic banks, economic unease and credit restrictions were to combine to bring this once highly successful caravan concern to an end.

The Bandit, an altogether more conventional vehicle employing a steel chassis and a Ford Anglia engine but retaining all of Berkeley’s reputation for performance pointed the way for the future. Sadly it came too late to save the firm. Only two prototypes were produced of a car which, given a little time and development, could have assured continuing success for Berkeley cars.