The 2-Litre Sports was a sport automobile and retrospectively known as DB1 and sold by Aston Martin since 1948 to 1950. Under the guidance of new manager, David Brown DB1 was the produced by the company. The automobile appeared first time to the public in 1948 at London Motor Show. It was based on the "Atom" image and only 16 were sold.

During World War II, Aston Martin developed a project called Atom and its 2.0 L four cylinder locomotive and tube-frame chassis were developed by Claude Hill. David Brown purchased Aston martin and after that construction started on the updated version.

The constructed prototype was entered in the 24 hours race at Spa in 1948 for testing its durability and the car won the race with drivers Leslie Johnson and St John Horsfall. The Spa car was rebuilt and shown as the model of other Spa Replica serial at London Motor Show.

Along with the cycle-fender Spa auto, Brown made Aston to make a 2-seat two-seater with a more traditional system for the London Show. This 2-Litre Sports, as the figure suggested, used the 2.0 L Claude Hill locomotive. This 90 hp (67 kW) unit could prompt the low, easy vehicle to 93 mph (150 kilometer/h).

13 of the cars wore an available two-seater system, as shown in London, good with a 3-part grille suggesting the after Aston Martin plan. One single characteristic of these cars was the compartment in one first extension for the trim bike.

One more 2-Litre automobile was shipped as a frame for usage coachwork. After the 1950 entry of the successor DB2, with the Lagonda straight-6 locomotive, the 2-Litre Sports became known wide as the DB1.

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