Estonia 21 is a racing car designed by Armin Limberg and built by Tallinna Autode Remondi Katsetehas.

[1] This was one most successful Estonia formula car.

The car was inspired by the Lotus 81 and it used ground effect .

It reached a maximum power of about 85 hp [3] (up to 110 hp in newer versions), which allowed the vehicle to accelerate to 210 km/h.

[2] There were four prototypes built and all in all 295 Estonia 21-M cars.