The 540 K was the more powerful successor to the 500 K. It was offered with different bodywork versions of which the convertible B was by far the most popular. In terms of its appearance, it was difficult to distinguish from the 500 K, depending on variant and model year.

• Cylinders 8
• Displacement 330 cu in
• Output 115 hp (85 kW)
• at engine speed 3400/min
• Top speed 106 mph
• Production period 1936-1939
• Units produced 419