Sparrow Automotive produces a kit which allows the Citroen 2CV to run a modern oil cooled BMW R series flat twin engines. You can use either the single or twin spark versions ranging from 850 cc to 1200 cc and will work with standard 2CV late style transmission or four/five-speed Citroen GS/A transmission with a Citroen Visa 625cc bell housing. The videos below show Sparrow Automotive’s test mule featuring a BMW 1100 engine producing 95 horsepower. That might not sound like a lot of power but this car only weighs 1,499 lbs (680 kg).
Source: Sparrow Automotive via ESD reader Marco