The Tatra 11 was a small 2-door, 4-seater car produced in 1923 – 1926 in Czechoslovakia. It had a simple, but mainly durable construction and used a spinal frame. The front axle of the car was rigid. The brakes were only on the rear axle, but they were dual. One pair served as the operating and the other as the handbrake.

The car was powered by a flat-six 1-litre air-cooled 2-cylinder engine with 12 hp (9 kW). The engine was mated to a 4-speed manual gearbox, which drove the rear axle. The approximate top speed of the model was 70 km/h with a fuel consumption of 10 l/100 km. It was replaced by the Tatra 12.