AutoZeitung mentions that they drove it on a BMW testcourse near Munich during a solar eclipse on August 11th 1999. It was a rainy day so they had to stopp snapping or driving the car several times.
They say that the project was commissioned by Dr. Gerhard Schmidt, the head of drivetrain development to compare different engine configurations and just to see if it was possible at all!
It took 3 engineers about 3 month to convert an arctic blue M Roadster into this orange beast.
They took the gearbox from a 850 ci
They had to modify the radiator, oilpump, oilpan, the exaust manifold, some other details and stiffened the springrates.
The car rather wants to go sideways through turns which doesn't make sense but sure is a lot of fun!
It has wheelspin from first through third gear and the engine produces 400Nm. already at 1000 rpm.