[urq] TT commercial - '1st AWD passenger car' claim

[Aleksander Mierzwa]

At 13:59 01-04-26 -0400, Andrew Duane USG wrote:

>> What does this mean?  I think it means that in 4WD the front and rear
>> axles must turn at the same speed, whereas in AWD the differential can
>> accomodate difereing speeds (for cornering, etc.)
>
>I always used it as: 4WD is something you have to shift into
>and out of. AWD is just all four wheels always driven.

Moreover, the fact that you are supposed to switch it on and off depending
on conditions usually means the system lacks center differential or is so
inefficient it only pays off to engage it during slippery weather,
off-roading etc. I recall reading about Renault 21 4x4 from the early 90s.
It lacked center differential, so the owner's manual explicitly told you to
engage 4WD only when you are driving slowly in mud, snow etc. and are
afraid of getting stuck.

--
Aleksander Mierzwa
Warsaw, Poland
87 5KT