I was wondering about the vdub/audi 4wd system is it actually 4wd on the quattros and 4motions or is it a case of the back wheels only kick in when you loose traction with the fronts. Would like to hear from anyone on how 4motions/quattros handle in the snow.
I would a loved a golf tdi 4motion but they were the wrong side of my price range when it was car buying time!!
I've got an old VW Passat B5 4Motion which is actually the Audi Quattro system with a Torsen central differential. The Audi A3 system is just a renamed VW 4Motion system which has a Haldex coupling that brings in the rear wheels after slip has started- so is the 4Motion system in the new Passat. So the Audi Quattro system, Subaru system (this one might be very close to a constsnt 50-50 split) and Honda CR-V systems are the only ones fitted to cars and SUVs I know of that are full time 4WD - I sure that there are a few more. The
problem, as said before is, that part time 4WD systems allow you to lose traction before helping you out - which is a bit of a compromise really, thought thta system saves fuel in good conditions. I'd reckon that the next generation of VAG Haldex 4WD systems will be controlled better and be a lot closer to full time 4WD systems in use while still be cheaper to run in good road conditions.
99 times out of a 100, my B5 Passat 4Motion will just move off with no drama at all, so its a shock if you get out of the car and can hardly keep your feet. In extreme icy conditions, like last Tuesday, it felt funny going round a smooth icy corner then proceeded to maintain the normal road speed while moving up the next icy (sheet ice) stretch at about 30 degrees to the correct direction of travel - they do tend to be boringly efficient, you just need to look out for other road users - oh and 4WD does not improve braking at all, something to always bear in mind!(the laws of physics remain intact even in a 4WD world)
One last thing, VW are about or have launched a new pick-up truck in South America - and maybe even in USA and it uses the Torsen Quattro style 4WD system - so it must still be consider better than the "almost" 4WD 4Motion system, remember there is quite a bit of confusion caused here as Audi Quattro Torsen systems were badged Syncro and then 4Motion when used by VW and 4Motion Haldex systems were rebadged as Quattro when used in some Audis.