Just writted a gear closeness converter and grapher..
ceck out the image of the Scenic RX4 box compared to the 172..
the lower lines are closer ratios
the lower of the lower lines (if that makes sense ?) is the closer ratio..
the upper lines are mph at each gear change..
I would be interested to see a willy box to compare to the 172...
the scenic box would be kew with a tubo though..