This is quite far from the topic but WTH.
I made some hypothetic calculations with the Citroen DS3 R3T as a base.
DS3 R3T kit, which includes the Racing engine, assembled and bench-tested, ready to be mounted: 62.000
The gravel kit: 7.800
Donor car: 30.630 (its the price of a DS3 THP 207 Racing which price in Finland without our beloved car taxes)
Assembling of the car: 20.000
62.000 + 7.800 + 30.630 + 20.000 = 100.430
What are not needed from the R3T kit for the 4WD formula are the R3T gearbox and the reinforced body shell with roll cage. The spare part price for a Renault Clio R3 body shell is 7.570 and the spare part price for the gearbox is 9.393 . The spare part price for the Honda Civic R3 gearbox is 9.000 .
Choosing 7.600 as the spare part price for the body shell and 9.000 for the gearbox and assuming a 10% discount when these parts are included in a complete kit would result in a price of 6.840 for the body shell and 8.100 for the gearbox and both summed 14.940 .
Basic kit for the 4WD = 100.430 - 14.940 = 85.490
The 4WD kit I picked from
here (post #503)
Gearbox: 24 500
Rear diff. : 14 500
Propshaft : 3 250
Rear driveshaft : 950
Body shell : 23 000
Gravel hub carrier assembly : 4 200
Rear subframe with arms : 5 300
24.500 + 14.500 + 3.250 + 2*950 + 23.000 + 2*4.200 + 5.300 = 80.850
Usually theres a discount when buying a complete kit (as you all probably know what the price for a car would be if it would be build using spare part prices).
4WD kit 10% = 72.765
4WD kit 20% = 64.680
4WD kit 30% = 56.595
The kit discount for the Honda Civic is ~ 9% and for the Fiesta R2 ~ 30%.
Adding the basic kit and the 4WD kit:
85.490 + 72.765 = 158.255 for a complete car
85.490 + 64.680 = 150.170 for a complete car
85.490 + 56.595 = 142.085 for a complete car