Winter tyres or all-weather tyres for rear-drive cars?

My daughter would like either a BMW or Mercedes-Benz but is very nervous about rear wheel drive in the snow & ice. I know from your excellent articles that you have enthusiastic views on winter tyres. This option is out (cost and practicality). What about "all weather tyres?"

If r/w drive is pretty useless in snow but 100% better with winter tyres, what % better are cars with all "weather tyres?" I think you likened a car with winter tyres as good as a 4 wheel drive vehicle.

Are they readily available for most sizes of tyre?

Asked on 6 December 2012 by sg&p

Answered by Honest John
The advantage of all weather tyres is you can leave them on the car all year round. The disadvantage is that the best of them are only about 50% as effective as the best winter tyres. But, the best of them are probably more effective than the worst winter tyres. Vredestein Qadtrac and Bridgestone A001s seem to get the best results in tests.
Similar questions
Are rear-wheel drive cars easier to drive in winter conditions if the engine is also rear fitted e.g. as in a Smart?
Is it okay to fit winter to rear wheels only on a rear wheel drive car?
I am in the process of buying a new car and have narrowed my search down to an Audi S3, Volkswagen Golf R or BMW M140i.The best to drive is the BMW, but given that it is RWD and the other two are 4WD,...
Related models
Great to drive and superbly built. Wide choice of models, improved from 2007 with Efficient Dynamics. 118d is super economical.