Are new models better? -
Another factor to add to all the above is whether the new model is 'evolution ’ or 'revolution '.
ie:, the Scania 2 series to 3 series was wasn’t much of a change, from the drivers point of view, a curved dash, different colour trim and electric windows was about it, and many of the mechanical parts hardly changed either, so it felt like putting on an old pair of slippers.
In contrast, a model change like the F10 / F12 to the FH, was a completely new truck, from the ground up - so for the driver it felt unfamiliar in comparison.
I’m guessing that the big model changes of the mid 90’s - Volvo F to FH, Scania 3 to 4 series, Merc NG to Actros for example were driven by the shift to Euro 3 emissions, which meant completely new designs, electronic fuel systems, 4 valves per cylinder etc - and the need for greater cooling capacity, meaning bigger radiators, which meant new cabs - all revolutionary at the time.
Just as an aside, I had driven 2, then 3 series Scanias, then my first trip in the ‘new’ 4 series, was the one and only time so far, that I broke down and wasn’t able to get myself going - it turned out that the early 124 - 400’s had a bit of an appetite for breaking rockers and bending pushrods - so much so, that European Freight in Dover, who I was driving for at the time, were putting spare rockers & pushrods in the trucks, but as they were warranty jobs, we had to call a Scania agent. The Spanish mechanic who fixed mine must have seen a few of them already, as he had a piece of wire, already bent to the exact shape and length to retrieve the bent pushrod.
That 4 series was brilliant on fuel mind, regularly doing better than 10mpg, using a mix of National roads and Autoroute running to Spain, I don’t think I’ve ever bettered that.
Cheers all, Keith