If classics could talk, the BMW 328 Mille Miglia Touring Coupé from 1940 would probably say: "The truth is in the details - in the millimetre range." The so-called "328 mm cold case" is not only an exciting collector's item, but also a prime example of how precise engineering and scientific methods can shed light on decades-old shadows.

Flashback: A question of authenticity

Back in 2006/2007, we at Kukuk were faced with an unusual case: a vehicle near Detroit with a breathtaking history, associated with the Mille Miglia and the racing elite of the time - but also with many question marks regarding its originality and authenticity. The central question: Is this vehicle really the original Mille Miglia Coupé from 1940? And if so, which starting number?

Then as now, our approach was: Facts instead of assumptions, data instead of myths.

What is known today as "digital twin" was already a reality for us back then. As early as 2006/7, we were already using 3D scanning and photogrammetry - the scientific method for three-dimensional reconstruction from two-dimensional photographs. 

Basis: The legendary original archive photos of Milanta (c 2007), which show the original vehicle during and before the race.

With a programme developed in cooperation with RLE International method, we digitised these images to sub-millimetre level and created a complete 3D model of the historic vehicle. 

The comparison: form follows function - and fact

Thanks to the 3D analysis, it was possible for the first time to compare not only dimensions, but also entire sheet metal contours, radii, overhangs and beading. In particular, the striking transition between the roof and the rear line - an aerodynamically and stylistically defining point - revealed significant deviations in many candidates.

We were also able to identify differences of up to 15 mm in the area of the front section and the radiator opening on the basis of the point clouds - a clear indication of later reconstructions or conversions.

The Milanta photos: more than just archive material

For decades, Mario Milanta's photos were regarded as aesthetic archive material - until we interpreted them as technical evidence. By precisely calibrating the camera axes and perspectives, we were able to extract real dimensions. The highlight: Combined with known reference points from vehicle technology - such as rim diameters, door gaps or wheel arch radii - each image became a measurable 3D section (the number of images and other details also play a role!).

📁 The speciality:

• We obtained more than 13 original glass plate negatives from 1940 from the Milanta archive.

• These were converted into a high-resolution 3D point cloud by the company RLE under the direction of Robert Rupa.

• At the same time, we carried out tactile 3D scans on the vehicle itself - bodywork, frame...

• Both data sets were superimposed: historical contour against real actual geometry. The result: a complete, dimensionally accurate historical comparison.