The Alfa Romeo Alfa 6 was introduced in 1979. A four door luxury sedan, the Alfa 6 was named for its six cylinder engine. Also referred to as the Alfa Sei (six in Italian), this series of sedans was offered with a choice of two V6 gas engines, or an inline five diesel. The Alfa 6 saw a facelift to the model in 1983, before the end of production in 1986.