Disclaimer: The capacity of the 1.5L boxer was 1490cc, not 1570 as erroneously stated in the video. Sorry for the oversight!
Although it was designed and tested as a 1500cc engine, the #AlfaRomeo #boxer #engine debuted in 1972 in 1.2 liters, single-carburetor form, to place the Alfasud at a comfortable distance from the Giulia in the Alfa range.
The first significant evolutionary step for the boxer came in 1976, under the bonnet of the pretty Alfasud Sprint coupé. That first 1.3 liters engine was to be shortlived though, superseded in 1978 with a new version that shared its stroke with the 1.5 liters engine that debuted that same year. Both power units would gain their typical two double-barrel carburetors in 1979 and be carried over mostly unchanged from the Alfasud to the 33, in 1983.
By 1990, the Alfa Romeo boxer engine and the 33 reached their evolutionary peak, with the introduction of the range-topping 1.7 16 valves.

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