Year 
Model Displacement Power Weight The Aero was a Czech automobile, manufactured between 1929 and 1947 by a well-known aircraft and car-body company owned by one Dr. Kabes in Praha-Vysocany.
The original model, the Aero Type 500 cyclecar, had a 499 cc single-cylinder two-stroke engine with water cooling. Drive was to the rear axle through a 3 speed gearbox to a back axle without differential. Body styles were a roadster, cabriolet and coupé all with two seats in the front and one in the rear. About 1500 were made.
The next model in 1932, the Type 20, was a 660 cc vertical twin with, among other improvements, four wheel brakes. The most common body was a two door 3 seat roadster but 4 door saloons were also made using steel covered timber framed coachwork. A 999 cc 26 bhp engine was available from 1932.
roadster 2 doors / 4 seats, petrol (gasoline) 2 cylinder straight (inline), 0 valves two stroke, 998 cm3, 21.6 kW, manual 3 speed, front wheel drive
roadster 2 doors / 5 seats, petrol (gasoline) 4 cylinder straight (inline), 0 valves two stroke, 1997 cm3, 33.6 kW, manual 3 speed, front wheel drive
