[rallyhub]

That is a lot of research you have done.

I measured a width of 61.3mm for the SRC Delta S4.
Width: 1860mm= 58.1mm @1:32 scale.
That is about 3mm too wide, which is acceptable to me.

The Avant Slot Manta and Alpine A310 are really way too wide.

Rally cars should be driven on a narrow rally track, not on a wide club race track.
On such a rally track, a wider car has a disadvantage, because it is more likely to slide off the narrow road and loses grip.
For example on my Swedish Rally Track wider cars hit the track sides more often than narrower cars, which takes a lot of time.
Moreover, a perfect scaled down rally car that rounds a corner on two wheels is more realistic and a lot of fun.

Hub