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JdeW
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I 've seen R4's lifted with a forklifter in stands 3 to 4 in height.
Not aware of any hoist kit for lifting a R4.
I think you've got to be creative with materials like an electric winch, hoist joke and the +2000 years old technology of pulleys.
Furthermore a sturdy construction like a massive ridge beam in a shed that can hold the weight.
electric winches that lift 800/1000 kg cost approx. 150 euro's
I myself hoist the body to the ridge of my shed during restoration.
Not aware of any hoist kit for lifting a R4.
I think you've got to be creative with materials like an electric winch, hoist joke and the +2000 years old technology of pulleys.
Furthermore a sturdy construction like a massive ridge beam in a shed that can hold the weight.
electric winches that lift 800/1000 kg cost approx. 150 euro's
I myself hoist the body to the ridge of my shed during restoration.
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laxeian
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The suspension on a 4 is torsion bar so the ride height ( if you talking about suspension lift) can be played with up or down by changing bar spline position, similar to the air cooled dubs but with a lot less aftermarket easy aids (special tools needed, info on threads here about suspension rebuilds). For a 4x4 there was the sinpar 4s. A quick search on a site such as http://vehicules-anciens.fr/fr/pieces-renault-r4-4l/carrosserie in the rally (raid) stuff might give you a starting point on how your going to go.
JdeW
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Hmmm, that's indeed another way to look at the term lift or phrases like "Lift kit for Renault 4 GTL" or "if it’s even possible to lift one" 
The term "raise the suspension hight" would be better.
You would need "the tool" for the front torsion bars and an easier self made tools for the rear.
Depending on the build of your R4 there are three versions of front and rear torsion bars namely torsion bars that are are adjusted using a lever fixed to the rear end of the bar, which has 4 or 5 possible tightening positions on the chassis. The end of the bars (where the lever or the axle is fixed) is hexagonal. This adjustment system is not very precise.
From the end of 1968 (1969 models) and until 1978, the ends of the bars are no longer hexagonal but notched. The height under the body is achieved by modifying the notching of the bars in the axle and the anchoring lever and the "fine" adjustment is achieved using a cam pressing more or less on the anchoring lever of the torsion bar.
Finally, models since October 1978 have a fixed anchoring bearing at the chassis level. The adjustment is therefore made only from the notching at the end of the bars, thanks to an improvement in the production and control of the bar calibration. This system is optimal (for an R4 of course), a shift of one notch modifies the height under the hull by a fixed value.
All tutorials can be found here https://www.la4ldesylvie.fr/tutoriels-de-mecanique-et-bricolage-sur-les-renault-4
The term "raise the suspension hight" would be better.
You would need "the tool" for the front torsion bars and an easier self made tools for the rear.
Depending on the build of your R4 there are three versions of front and rear torsion bars namely torsion bars that are are adjusted using a lever fixed to the rear end of the bar, which has 4 or 5 possible tightening positions on the chassis. The end of the bars (where the lever or the axle is fixed) is hexagonal. This adjustment system is not very precise.
From the end of 1968 (1969 models) and until 1978, the ends of the bars are no longer hexagonal but notched. The height under the body is achieved by modifying the notching of the bars in the axle and the anchoring lever and the "fine" adjustment is achieved using a cam pressing more or less on the anchoring lever of the torsion bar.
Finally, models since October 1978 have a fixed anchoring bearing at the chassis level. The adjustment is therefore made only from the notching at the end of the bars, thanks to an improvement in the production and control of the bar calibration. This system is optimal (for an R4 of course), a shift of one notch modifies the height under the hull by a fixed value.
All tutorials can be found here https://www.la4ldesylvie.fr/tutoriels-de-mecanique-et-bricolage-sur-les-renault-4
laxeian
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Lifted’ can also mean a car thats been stolen or the car thats on the back of a private contractors recovery vehicle, same thing if your the owner of said car coming back to an empty parking space, its gone!, so I’m hoping we have covered the answer.
