A ride in BMW’s cars of the future

So, on first impressions I don't for one minute doubt BMW's claim of 4.6 seconds for 0-100kph. And because the body is designed to be so slippery through the air to aid economy, the 250kph governed max should be a cinch too.

Then we go off to the snow tracks. There's a circle hundreds of metres across. My man negotiates this in one constant opposite-lock drift. Then we do the snakier track, and again it's obvious the car has loads of traction, but it's definitely rear-biased. The car isn't so much cornering as moon-walking.