Siata's swan-song on a Fiat 850S floorpan - dressed up with square-tailed roadster coachwork and a mock-MG grille. Engine tuned the way the customer wanted it, and front disc brakes on later cars. None made 1971-72, but back again in '73 with ORSA badging.
- 843cc (S4 OHV)
- Rear engine, rear-wheel drive
- Production dates:
- 1968 to 1975
- Number produced: