Tatra26

The Tatra 26 began as a six-wheel experiment built around the smaller Tatra 12. Three prototypes kept that car's air-cooled flat-twin engine, but testing showed that the unit did not provide enough power for the heavier 6×4 chassis. Tatra answered by fitting the larger flat-four from the Tatra 30, and the developed vehicle became the 26/30. That change is why period names and modern references can appear to describe the same family differently.

The resulting machine was less a single body style than a working platform. Civilian and military bodies turned it into a light truck, bus, ambulance, troop carrier, and command car. Its backbone chassis and driven rear axles placed it firmly inside Tatra's unconventional engineering tradition, while the range of bodies explains why surviving photographs can look like entirely different vehicles. Produced from 1927 to 1933, the 26/30 led toward the later Tatra 72 rather than toward the marque's streamlined passenger cars.