Avia » A21 / A31
The updated modification A21 and A31 with a capacity of 1,8-3,4 metric tonnes were presented in 1983. The main novelty was the upgraded engine, the working volume of which was increased to 3596 cm3 and the diameter of cylinders was raised from 98 to 102 mm. The power was increased to 83 hp. Transmission became a 5-speed. There is no difference of the updated models with the old A20/A30 range.