Despite the fact that it was -14 degrees Celcius, the BMW's test driver decided to take the new convertible out for a spin with its top down.
While both cars have been spied several times already, this is the first time that they've been photographed together. And these pictures, taken in bright sunshine, give us our clearest look yet at both cars.
Both cars ride on a front-engine, rear-wheel drive platform. It's said that the BMW Z5 will be offered solely as a soft-top convertible, while the Toyota Supra will be sold only as a two-door liftback.
Although it's yet to be confirmed, rumours indicate that the twins will be motivated by a selection of turbocharged four- and six-cylinder engines from BMW. A hybrid variant is also highly tipped for the Supra.
Even though it's covered from head-to-tail in camouflage, the Z5 doesn't look as though it will stray too far from BMW's current design template, and isn't a world removed from the Z4 that was discontinued last year.
The new Supra seems to mix together elements from the FT-1 concept and the previous generation Supra, which went out of production in 2002.
According to the rumour mill, the Z5 will make its debut later this year before going globally during 2018.