This page only provides information based on the personal opinion of the author. The author can't be held responsible for damage in any way that could result from modifications mentioned here.
P.O. stands for Pays d'Outre-mer (overseas countries). It's the Citroën name for cars with special preperation, making them more suitable for difficult terrain. Citroën A-types have a long P.O. history, the first P.O. 2CVs being built March 1954. All Mehari have some P.O. preperation, especially the 4x4. The most famous P.O. of all is the 2cv Sahara. This is a twin engined 4 wheel drive 2cv, quite rare nowadays. In the 70s Citroën organised some rally raids for 2CVs and derivatives. These were long journeys through desserts and other normally not encountered terrain. To prepare the participants for these raids, Citroën published the famous book Ici commence l'aventure.
With the information from these sources, including looking at original P.O. cars such as the Sahara, Mehari and P.O. 2CVs, i've compiled this page. This page can help you to built a 2cv well suited for the most difficult terrain and journeys. This is not a step by step guide. It can give you some ideas and solutions but you'll still have to do some development work yourself.
When the original type one is used, the following reinforcements can be made:
All arms can be additionally reinforced by cutting them open along the welding seam and welding a 2mm plate between the 2 halves of the suspension arms. All bump stops on the suspension arms can be reinforced as in the picture.
The front bumper is a tubular one with attached sump guard covering the whole engine bay, leaving both engine and gearbox protected. It's adviceably to put some additional lights on the front bumper, protecting them with fine wire mesh.
The rear bumper is a also tubular one. The fuel tank has to be protected. Either attach a sump guard covering the fueltank to the rear bumper or fit a seperate plate to cover the fueltank.
Make sure strong towing hooks/eyes are attached to the bumpers.
With the modifications described above, Citroën A-types are excellent raid vehicles. But for real off road driving it can be improved upon. This by fitting twin engines giving 4wd. Here are some tips on how to make the modifications needed.
At the rear a higher spring ratio is needed. 2cv6 or Dyane spring tubes are opened by cutting away a weld on one of the ends and the rear springs are replaced with a second pair of front ones. The rear spring connecting rods are replaced by a pair of front ones as well.
At the rear the steering is locked off. For this the steering rods are replaced by rosejoints and these are secured to the suspension arm. The tracking adjustment is retained. All steering equipment is removed from the rear axle tube.
The easiest solution is to use 2 levers, one for each gearbox, but this makes quick gearchanges a bit difficult (Aryan Schmitz).
The original sahara worked by not operating the levers on top of the gearbox lid but operating the sliding shafts inside the gearbox lid on which the selector forks are fixed. This makes operating the 2 gearboxes slightly easier then using the normal operating levers.
Engines and gearboxes
Body rear end
Commercially available 4wd kits