Product Description

The last of the four prototypes built by Wunibald Irmin Erich Kamm was called the K4.
The K4 was equipped with a standard BMW 335 inline six-cylinder engine (90 horsepower) and was a car in the premium passenger car category.
A unique feature of this four-stroke engine was that when it was rotating at a certain speed, the fuel-air mixture became leaner.
This means that the car was already incorporating cutting-edge fuel efficiency improvements at the time.
Another improvement was a built-in mechanism that allowed the driver to change tire pressure while driving.
This mechanism reduces fuel consumption and is thought to be particularly effective when driving at high speeds on the highway.
However, the drawback of the cam design was that it was very heavy.
This was a major problem, as the K4's total weight was around 1,500 kg.
Meanwhile, the standard BMW 335 weighed just 1,300 kg.

Ultimately, these improvements remained theoretical.
The start of World War II dramatically changed the political situation, leaving little room for further development of the car.
In 1939, Professor Wunibald Kamm designed the K4, and in 1940 the vehicle was built by the well-respected Reutter company.
As far as we know, road tests were also carried out, but the war soon put a stop to the whole project.
It is unclear what happened to this car during the war.
There are only vague records that it fell into French hands in 1945.
The car's whereabouts were never discovered after that.



Item Size/Weight : 18.2 x 8.1 x 7.4 cm / 212g

• *[ Regarding the product image ] The image may differ to the actual product.

Product Specifications

Car Manufacturer

BMW

Item code

04046

JAN code

4907981695521

Purchase Information