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The NX was able to drive on the ice tyres down a London street - but the entire car had to be deep-frozen at -30degC for five days before the stunt.
The Kikai was a star of the 2015 Tokyo motor show. It is designed to celebrate its mechanicals and places most of them on show. It's unlikely to ever see production, though.
BMW's GINA concept wasn't meant to reach production - but its fabric 'bodyshell' showed how the company was planning to develop the metal surfaces of its production cars.
German brands are keen to play on their heritage, and BMW has created a string of 'Hommage' concepts that do little more than reference some of its most famous old models. This is the 328 Hommage, a 2011 tribute that marked the 75th anniversary of the original car.
