This is only actually a Beta in name, with the only parts shared with the rest of the range being the engine block and internal door lock buttons. It’s a mid-engined two-seater, originally envisaged as the Fiat X1/20. Then someone realised it could be priced higher with a Lancia badge. Only sold with a two-litre engine in Europe, S1 versions had problems with locking front brakes, cured simply by removing the servo. 1980-on S2s were better in other ways too. With fine handling balance and expressive steering, these are under-rated driver’s cars.
info from Octane