Polski Fiat 125p is a motor vehicle manufactured between 1967 and 1991 in Poland under a Fiat license by the state-owned manufacturer Fabryka Samochodów Osobowych (FSO).

It was a simplified and altered variation of the original, Italian-made Fiat 125, with engines and mechanicals from the Fiat 1300/1500. To distinguish between the models, Fiat and FSO revived the marque Polski Fiat. After termination of the license, the car was branded as FSO 1300, FSO 1500 and FSO 125p.

There were two main versions, differing in the engine employed: the 1300 model (1295 cc, 60 PS), entering into production in 1968 to go on until the late 1980s, and the 1500 (1481 cc, 75 PS), from 1969.

Polish cars differed in many details from Italian ones: most visible were the double round headlights instead of the square ones, simpler bumpers and front grill, orange color front turn signal lenses, simpler body sheet metal stampings, and the old Fiat 1300/1500 chassis and interior (dashboard, column shifter etc.).

Unlike the Fiat 125, the car was also available as an estate (125p Kombi; introduced in 1972), and as a pickup developed in Poland from the Kombi after Italian Fiat 125 production ended. The pickup was first shown in 1972 but only entered production in 1975.

The car was produced until 26 June 1991 (to fulfill factory preproduction sales obligation – the communist prepayments system, system przedpłat); in total, 1.445.689 were manufactured. By that time the design was 24 years old and used mechanicals which were essentially 30 years old, with only minor improvements.

The Syrena was a Polish automobile model first exhibited at the Poznań Trade Fair in 1955 and manufactured from 1957 to 1972 by the Fabryka Samochodów Osobowych (FSO) in Warsaw and from 1972 until 1983 by Fabryka Samochodów Małolitrażowych (FSM) in Bielsko-Biała.

177.234 were manufactured by FSO and 344.077 by FSM, a total of 521.311. During its remarkably long production run it underwent only minor modifications.

The Syrena was produced in various models: 100, 101, 102, 103, 104, while the most popular model was the 105. All were two-door sedans with two-stroke engines, initially of two cylinders. In 1965 the Syrena received a larger three-cylinder engine.

From 1968 a prototype model named laminat was produced. A van called Syrena Bosto and a pick-up called the R20 were also produced. A coupé Syrena Sport and a hatchback Syrena 110 (in 1966) remained prototypes only.

A Siren is a mermaid who, according to the legend, protects the river Wisła and the Polish capital city, Warsaw. She is featured on the city's coat of arms. Also a diminutive name Syrenka (little siren) is commonly used for the car in Poland.