Chrysler Sunbeam

The Chrysler Sunbeam is a small supermini three-door hatchback manufactured by Chrysler Europe at the former Rootes Group factory in Linwood, Scotland, from 1977 to 1981. After the takeover of Chrysler's European operations by PSA, the model was renamed Talbot Sunbeam and continued in production until 1981. A Talbot Sunbeam Lotus version was successful in rallying and won the World Rally Championship manufacturers' title for Talbot in 1981.

In the mid-1970s, Chrysler UK (formerly Rootes Group) was, like much of the British car industry, in financial trouble. Chrysler's Linwood facility was generating significant losses and falling demand had led to its car making capacity being greatly underutilised.

In 1975, the Ryder Report led to the effective nationalisation of one of Chrysler UK's major competitor, British Leyland. Chrysler management pressed the government for its own state aid package and threatened to close the company's UK operations if it did not receive financial support. The government agreed to a state grant reported at £55,000,000 to fund the development of a small car, which was to be developed in Chrysler's UK facilities and manufactured at the Linwood plant.

The development of the new car started in January 1976, under the codename Project R424. The technical side was the responsibility of the engineering team in Ryton, while the styling was the responsibility of Chrysler's Whitley design studio in Coventry, led by Roy Axe (who left the UK for Chrysler's headquarters in the US before the car was launched). Many constraints, such as a very tight schedule, low budget and the need to use as many British components as possible, led to the decision to use the rear-wheel drive Hillman Avenger as the base for the new vehicle, rather than the increasingly common front-wheel drive favoured by Chrysler's French subsidiary, Simca. The Sunbeam was, unlike the larger Horizon and Alpine models that were launched by Chrysler in the mid to late 1970s, never sold in France as a Simca. Although it was targeted at the supermini size class, the Sunbeam's Avenger underpinnings meant that it was slightly larger than its intended rivals, and overlapped with the Horizon model. For this reason, the Sunbeam was only available as a three-door nodel.

Basing the car on the Avenger's platform allowed for the car not only to use as many existing components as possible, but also to put it in production relatively quickly and cheaply. The Avenger's wheelbase was shortened by 3 inches (76 mm), and some modifications were made to accommodate the 928 cc Coventry Climax-derived engine, an enlarged version of the 875cc unit used in the rear-engined Hillman Imp. The car took its steering wheel and instrument pod from Chrysler's recently launched award-winning Simca 1307/Chrysler Alpine.

With the exception of the doors, which were shared with the two-door Avenger, the R424 was given an all-new body, styled very much in line with Chrysler's new, angular "international" style. This new design language was first seen on the 1975 Simca 1307/Chrysler Alpine, and later on the 1977 Simca/Chrysler Horizon (Project C2). Nevertheless, a constraint in the development process took its toll on the initial look of the car, as the C2's (Horizon's) headlamps were not available at the planned launch time of the R424, the small car was given the lamps of the pre-facelift Hillman Avenger, which required the characteristic recessed mounting in the front fascia.

The Sunbeam was only available as a three-door hatchback. The hatch was constructed in a similar style to the Hillman Imp and consisted of a single piece of glass. This designed necessitated a high rear sill. The high rear sill increased the car's structural rigidity, but offered restricted access when compared to its rivals. The Sunbeam's appeal may also have been hampered by the lack of alternative body styles. This was in contrast to the Sunbeam's main competitors in the UK, such as the Vauxhall Chevette.

Until the R424's launch, most Chrysler UK products were sold in export markets under the Sunbeam marque. By the mid-1970s Chrysler was striving to rationalise the number of brands in their European portfolio. The result was that when it appeared in showrooms the R424 would be sold as a Chrysler product. The Sunbeam brand was discontinued and the remaining Rootes Group models also rebranded as Chryslers in 1976.