Tatra JK 2500, the only prototype made in 1956. Never came to production. Engine was a Tatra 603 Sport, 8V cylinder, 2500 ccm, 103kW / 140PS with an Alfa Romeo, 4-speed gearbox. Length/width/height - 4050/1620/1220 mm, Wheel base - 2300 mm. Tread front/rear - 1350 mm, curb weight 1160 kg. Max. speed 207km/h (130mph). Construction by Julius Kubinsky.