The BMW Z21 project launched in the same year saw engineers at BMW Technik GmbH transferring their focus from off-road capability to enhanced driving pleasure on metalled roads. The result was a minimalist two-seater that left its engineering delights exposed to public view and truly lived up to the formulation of “Just 4/2” enshrined in its name.
Only rudimentary vestiges of bodywork can be seen in the BMW Just 4/2, and the wheels are freestanding to emulate a formula racing car. The four-cylinder power unit generating 73 kW/100 hp loaned from the BMW K 1100 model was more than a match for the prototype weighing only 550 kilograms.
The two-seater accelerated from a standing start to 100 km/h in around 6 seconds and notched up a top speed of 180 km/h. Specially developed clothing and helmets provided enhanced protection for the occupants alongside airbags for driver and passenger, and side-impact protection, to transform the Z21 project into a complete work of art at the premiere in Tokyo.