Admiral Ledfoot Here's some data on the Lesjofors springs that I found on Turbobricks:
Lesjofors {part number}
{description}
---
L: {length}
OD: {outer diameter}
WD: {wire diameter}
R: {spring rate}
################
Lesjofors 4095801
240 front
---
L: 452 mm
OD: 167 mm
WD: 13.5 mm
R: 15.3 N/mm (87.4 lb/in)
Lesjofors 4095802
240 diesel front
---
L: 485 mm
OD: 166 mm
WD: 13.5 mm
R: 17.5 N/mm (100 lb/in)
Lesjofors 4295801
240 sedan rear
---
L: 422 mm
OD: 127 mm
WD: 12 mm
R: 17.2 N/mm (98.3 lb/in)
Lesjofors 4295803
240 wagon rear
---
L: 407 mm
OD: 134 mm
WD: 13 mm
R: 21.1 N/mm (121 lb/in)
Lesjofors 4295816
240 ambulance rear
---
L: 410 mm
OD: 132 mm
WD: 14 mm
R: 30.0 N/mm (171 lb/in)
Lesjofors 4595804
240 sedan sport kit (35 mm lower)
---
R front: 29 N/mm (166 lb/in)
R rear: 26-35 N/mm (147-200 lb/in)
Lesjofors 4595805
240 wagon sport kit (40 mm lower)
---
R front: 29 N/mm (166 lb/in)
R rear: 23-33 N/mm (131-188 lb/in)
The sport kits have progressive rate in the rear. I also verified that the sport kit's rear rates are lower for the wagon.