D.B.

France, 1938 – 1961

Automobiles D.B., Champigny-sur-Marne, Seine

Deutsch and Bonnet were building ‘specials’ based on 11CV traction avant Citroëns in 1938. In 1947 limited production began again, the first DBs being competition machines largely built up from reconditioned components, using 1½-litre and 2-litre engines and 4-speed gearboxes. A new DB car based on the Dyna-Panhard ran at Montlhéry in 1948, while in 1949 the Deutsch and Bonnet (DB) company produced a 500cc single-seater version for Formula III, with the Panhard engine mounted in the nose, and independent swing-axle rear suspension. Some 100mph Citroën-based Deutsch and Bonnet (DB) convertibles were also made, but after 1950 Deutsch and Bonnet (DB)  devoted all their energies to Panhard derivatives. Though never a major force in Formula III, the Deutsch and Bonnet (DB) cars gained numerous International Class Records and won the Index of Performance at Le Mans five times (1954, 1956, 1959, 1960 and 1961). Also Laureau’s Deutsch and Bonnet (DB) won the 1954 TT outright. An attempt to contest the 2½-litre GP Formula of 1954 with the alternative permitted size of 750cc supercharged was a fiasco, and little came of the curious Deutsch and Bonnet (DB) Monomills (the same cars with blowers removed) with which Deutsch and Bonnet tried to popularize one-class racing in France. Equally abortive were experiments with twin engines and 4-wheel drive (for sale in 1952) and with rear-mounted Renault engine and 5-speed gearboxes (for sale in 1953). The production Deutsch and Bonnet (DB) sports coupés used regular Panhard mechanical components allied to light alloy bodywork (fiberglass from 1955) and were marketed in various engine capacities from 610cc (30bhp) to 1300cc (65bhp). M.A.G. low-pressure superchargers were listed from 1954, and disc brakes were an option a year later on Deutsch and Bonnet (DB). The standard 1958 Deutsch and Bonnet (DB)model was the Rallye coupé with a 55bhp 850cc engine. Deutsch and Bonnet (DB) remained faithful to Panhard until the partnership was dissolved in 1961. René Bonnet continued the manufacture of cars in the Champigny works under his own name.

Source: Georgano, encyclopedia of motorcar; MCS
The information is written with the greatest of care. However, if you have any suggested amendments please contact us at office@prewarcar.com

Duesenberg

US, 1920 – 1937, 1966

(1) Duesenberg Motor Co, Indianapolis, Ind., 1920 – 1937

(2) Duesenberg Corporation, Indianapolis, Ind., 1966

Fred Duesenberg began by making bicycles and designed his first Duesenberg car, the Mason, in 1904. He and his brother August made engines with horizontal overhead valves for the 1912 Mason racing cars, and founded Duesenberg Motors in the following year in order to produce marine engines and complete racing cars bearing the Duesenberg name. The most famous of the latter appeared in 1920: a 3-litre Bugatti-inspired Duesenberg straight-8 with single overhead camshaft and three (vertical) valves per cylinder. This Duesenberg won the 1921 French Grand Grand Prix. In the 1920s the Duesenberg racing cars were the great rivals of the Millers at Indianapolis, and victory was assured in 1924 by the adoption of a centrifugal blower on Duesenberg cars. Though a two-stroke 1½-litre 8-cylinder racing engine capable of 7.000rpm was made in 1926, this was not proceeded with. The horizontal-valve Duesenberg engine was taken over in 1920 by the Rochester Motor Manufacturing Co Inc and was used in various sporting and luxury cars.

Meanwhile, at the end of 1920, the first Duesenberg production car made its debut. This Duesenberg Model A was an extremely expensive, if very advanced, luxury car, embodying an 8-cylinder in-line engine – the first to be seen in an American production car – of 4.2 litres, basically similar to the Duesenberg racing unit, but with only two valves per cylinder and developing about 100bhp. There were also hydraulically-operated front wheel brakes – another ‘first’ as far as America was concerned. The Model A was current until 1926. A handful of its little-altered successor, the Duesenberg Model X, was made in 1926-1927, but in the former year E.L. Cord of Auburn acquired control of the Duesenberg company. He stipulated that Fred Duesenberg’s next car should be completely new, and a quite exceptional machine. In fact, the Duesenberg Model J, which made its bow at the end of 1928, was the most remarkable automobile in America: bigger, faster, more elaborate and more expensive than any other, yet also superior to them in refinement and good looks. Its 6.9-litre, 8-cylinder engine, made by Lycoming (a firm which Cord had also bought), had two chain-driven overhead camshafts operating four valves per cylinder; a layout of racing type unique among American cars at the time and said to develop 265bhp at 4250rpm – more than double the output of any rival. Although the complete Duesenberg car weighed more than 4980lb, it was claimed to be capable of 116mph in top gear and 89mph in second. Only Duesenberg Model J chassis were made for which $8500 was asked in 1929. Immensely long and strong and lowbuilt, Duesenberg cars were very popular with all the leading coachbuilders. The Duesenberg company preferred to sell cars complete with bodies designed by them but made by approved builders, such as Murphy, Bohman & Schwarts, Judkins, Derham and Le Baron. In this form, catalogued Duesenberg models cost up to $17.950. The transmission – apart form the double dry-plate clutch – was conventional, as was the suspension by half-elliptic springs and hydraulic shock absorbers. The brakes, of course, were hydraulic, with vacuum servo assistance from late 1929.

In 1932 a supercharged version of the Model J, the Duesenberg SJ, was added. To cope with the 320bhp now alleged to be available, bearings, reciprocating parts and valve springs were strengthened. Usually, the shortest Duesenberg J chassis was used, with the highest axle ratio and stronger front springs. A maximum speed of 129mph was attributed to the Duesenberg SJ, with an acceleration figure of 0-100mph in 17 seconds.

Duesenberg survived the Depression, but died in the collapse of the Cord Corporation in 1937. Attempts to revive the Duesenberg name were made in 1947 and in 1966. The first Duesenberg was unsuccessful, and in 1966 only one Duesenberg car was actually made, powered by a 7-litre V8 Chrysler engine with push-rod overhead valves, developing 431bhp at 5.000rpm. Transmission was automatic, front suspension was independent, and there were disc brakes. Body styling was by Ghia. This Duesenberg venture, too, collapsed.

Source: Georgano, encyclopedia of motorcar; TRN 

The information is written with the greatest of care. However, if you have any suggested amendments please contact us at office@prewarcar.com