Land Rover NRC 8044 and 8045 coil springs.
A kind soul has measured these up. They have 9 coils each
15.2 mm bar. The lowest two coils are at a tighter pitch of 27
mm with the
rest being around 47 mm. I calculate this gives a rate of 155
up to around 84 mm (3.3") of compression and then increases rapidly to
lb/in as the lower coils touch.