The 2 Liter is a passenger car initially sold by German automaker Adler from 1938 to 1940. It replaced the earlier Trumpf model and featured a more powerful engine. A total of approximately 7470 examples were made.

The 2 Liter was fitted with a 1910cc four-cylinder four-stroke engine capable of generating 45 bhp (33 kW) of power, and allowed the vehicle to reach a top speed of 110 km/h. It weighed between 1100 and 1140 kg, measured 4540 mm long, 1600 mm wide, 1580 mm high, and rode on a wheelbase of 2920 mm.