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They also had a freewheel system in the gearbox because a two stroke can’t run with a closed throttle as the oil is in the fuel, and for e.g. with the car rolling down a hill with the throttle off it’d damage or destroy the engine (depending on how long the hill is).
You can therefore get phenomenal fuel economy in one if you tuck into the wind shadow behind a large vehicle and allow it to pull you along.
I read thst one had a Ford V4 In it , hence the bonnet scoop .
Earlier ones were 2 strokes I think ... can only imagine the tinkering .
I watched a Scandi film a few weeks back where 2 neighbours chronicled there Relationship in a Saab vs Volvo evolution... black humour film ( a man called Oleg or something?