Aston Martin DBR1

Following rule changes that freed sportscar constructors from the requirement to use road-legal cars or derivatives, Aston Martin was able to design the DBR1 from a clean slate for 1956. Chief designer Ted Cutting evolved the body from the shape of the DB3S, producing a much lower profile. The most significant visual change was that the back of the front wheel well was fully enclosed, with a large triangular vent on the side — a design trait that became standard on all subsequent Aston Martins. The car was initially fitted with a 2.5-litre (2493 cc) all-alloy racing engine (RB6.250) derived loosely from the racing version of the Lagonda Straight-6, sized to comply with the Le Mans 24 Hour regulations of the time. The 3.0-litre RB6.300 Straight-6 (2992 cc), rated at 250 hp, was developed for the 1957 season.

The DBR1 debuted at the non-championship 1956 24 Hours of Le Mans, with the 2.5-litre DBR1/1 entered alongside two older 2.9-litre DB3Ss by David Brown's racing team. Despite competitive running against larger-engined cars including the winning Jaguar D-type (3.4 litres), the DBR1 suffered gearbox failure after 246 laps while running seventh, retiring drivers Reg Parnell and Tony Brooks.

Making a full debut in the 1957 World Sportscar Championship season, Aston Martin started with DBR1/1 in 2.5-litre form. The car recorded its first finish with a second place for Roy Salvadori at the British Empire Trophy, followed by another second at Goodwood's Sussex Trophy. DBR1/1 was then upgraded to the 3.0-litre engine and joined by the identical DBR1/2. At the Spa Sportscar Race, Tony Brooks won ahead of Salvadori for a 1–2. The DBR1s then made their World Sportscar Championship debut at the fourth round, the 1000 km Nürburgring, where DBR1/2 won overall with Brooks and Noël Cunningham-Reid — Aston Martin's first World Championship win since the Collins/Griffith DB3S at the Tourist Trophy in 1953. This victory came against the works Ferrari and Maserati efforts, including their 335S and 450S models in the hands of Peter Collins, Mike Hawthorn, Stirling Moss, and Juan Manuel Fangio. Both DBR1s failed to finish at the 1957 24 Hours of Le Mans, ending championship hopes; Aston Martin skipped the final two rounds in Sweden and Venezuela. At the non-championship Spa Grand Prix, DBR1/2 won again with Brooks, ahead of Masten Gregory in a Ferrari 290 MM and Olivier Gendebien in a Ferrari 335S.

For 1958, the third chassis DBR1/3 was completed, giving Aston Martin three cars. The World Sports Car Championship was now restricted to 3-litre engines, making the DBR2 with its 3.7-litre engine ineligible; David Brown concentrated on the Championship with the DBR1 alone. The team skipped Buenos Aires and entered the 12 Hours of Sebring, where both cars retired with gearbox failure — though in Moss's hands the car was the fastest in the race. At the Targa Florio, DBR1/3 also suffered gearbox failure, but Moss broke his old lap record set in the Mercedes 300SLR by over a minute. At the 1000 km Nürburgring, Moss and Jack Brabham drove DBR1/3 to victory over a large contingent of Ferraris and Porsches. All three DBR1s again failed to finish at Le Mans. However, at the Tourist Trophy, Aston Martin achieved a 1–2–3: Moss and Brooks in DBR1/2 won, Salvadori and Brabham in DBR1/1 finished second, and Carroll Shelby and Stuart Lewis-Evans in DBR1/3 finished third. Ferrari had not competed having already clinched the championship, and the race was of four-hour duration with only half points awarded; Aston Martin finished second in the constructors' championship behind Ferrari.

For 1959, Aston Martin completed two additional chassis, DBR1/4 (a conversion from DBR3/1) and DBR1/5, a spare chassis sold to privateer Graham Whitehead — the only DBR1 sold to a privateer during the factory campaign years. DBR1/1, driven by Salvadori and Shelby, failed to finish at the 12 Hours of Sebring, where Ferrari scored a 1–2 with their 250TR. Aston Martin skipped the Targa Florio, which Porsche won with a 1–2–3–4. DBR1/1 then won the 1000 km Nürburgring again with Moss and Jack Fairman driving. Most significantly, DBR1/2, driven by Carroll Shelby and Salvadori, won the 1959 24 Hours of Le Mans outright. DBR1/4, driven by Maurice Trintignant and Paul Frère, finished second, the next closest competitor a full 25 laps behind. The championship came down to the final round, the Tourist Trophy at Goodwood. During the race, the leading DBR1/3 caught fire while refuelling, ending its race and blocking other Aston Martin pit stalls. Privateer Whitehead withdrew his DBR1/5 entry to donate his pit stall to the factory team. Moss took over the Shelby/Fairman car (DBR1/2) and secured the win and the championship. Aston Martin scored 24 net points from their three victories; Ferrari finished second with 18 net points and Porsche third also with 18 net but fewer gross points. This was Aston Martin's only World Sports Car Championship title.

Following the 1959 championship, David Brown shifted focus to Formula One with the DBR4 and DBR5, which proved unsuccessful. The David Brown Racing Department withdrew from sportscars and the four factory-retained DBR1s were sold to customers. Notable privateers included Border Reivers, Ian Baille, David Hamm, and Essex Racing Stable. DBR1/3 finished third at the 1960 Oulton Park and third at Le Mans with Salvadori and Jim Clark, then won at Charterhall in 1961 driven by Ron Flockhart — the final victory for any DBR1. DBR1/2 won the 1960 Rouen Grand Prix with Fairman. In 1961, two DBR1s failed to finish at Le Mans; after 1962 all DBR1s were retired from racing. DBR1/3 is on display at the Simeone Foundation Automotive Museum in Philadelphia.

This article is based solely on the supplied corpus. No external sources were consulted; claims that could not be substantiated against the corpus were omitted under the drop-the-claim rule.