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Development In 1974 FSO chose Fiat's Experimental Safety Vehicle project
ESV 2000 prototype as the base of a new car which became known by Fiat at the Type 137. FSO's designer Zbigniew Wattson joined Walter de Silva to convert the ESV project to suit the donor Fiat 125P floorpan and running gear and designed the exterior and interior for these prototypes of Type 137 and sent them to Poland for FSO to turn into a production car.
Debut In May 1978, mass production commenced. The official premiere of the FSO Polonez 1500 and FSO Polonez 1300 took place. In 1979, the FSO Polonez 2000, sold mostly to government officials, appeared. The Polonez 2000 has a Fiat twin-cam engine with 1,995 cc, , a 5-speed gearbox, a 0–100 km/h acceleration of 12.0 seconds, and a top speed. The
FSO Polonez 2000 Rally with a 2-liter Fiat DOHC engine was debuted in the Rallye Monte Carlo. In 1980, the FSO Polonez 1300 and 1500 three-door appeared. With the same short front doors as the five-door version, it was produced from 1979 until 1981 with about 300 units. In 1981 and 1983, the FSO Polonez Coupé, with three-door bodywork was introduced. It had the usual 1,481 cc engine with or the 2.0-litre Fiat Twin Cam unit. It was the first FSO model to feature electronic ignition and fuel economizer owing to a supply of pre-heated air to the suction manifold. Only a few dozen were produced. In 1983, the Polonez C and CE were introduced as a more economical version and was known as the "Kryzysowy" (Crisis) model. This model was stripped of a variety of equipment and trim including the change of rubber bumpers for a black painted steel bumper, Changing the four front lights to a pair of rectangular ones that came from the
Wartburg 353, deletion of the side rubbing strips, rear window wiper-washer, fog lamps, hub caps, luggage cover, and tachometer. Basic vinyl was used on the seats and in the luggage compartment, and static seat belts replaced the inertia reel ones. The CE model featured electronic ignition. At the other end appeared a new top version, the FSO Polonez 1500 X. This was fitted with the AB 1,481 cc engine of , a five-speed gearbox (final drive ratio 4:3), and a radio. It was sold in the domestic market, usually for U.S. dollar payments. In 1983, the Polski Fiat 125p was renamed FSO 125p, after FSO's licence rights to the Fiat badge expired. The new naming system for FSO's models was as follows: • FSO 125p: 1.3 L, 1.3 ML, 1.3 ME, 1.5 C, 1.5 L, 1.5 ML, 1.5 MS, 1.5 ME • FSO Polonez 1.3 C, 1.3 CE, 1.3 L, 1.3 LE, 1.5 C, 1.5 CE, 1.5 L, 1.5 LS, 1.5 LE, 1.5 X, 2000. Also in 1983, the FSO Polonez 2.0 D Turbo with an Italian
VM Motori HR 488 engine of 1,995 cc appeared. It produces at 4,300 rpm and at 2,500 rpm. Final drive ratio is 3,727, for a 0–100 km/h acceleration time of 20,0 s, and a top speed of . Fuel consumption is 7.1/10.6/10.0 L/100 km, and approximately 100 cars were produced to this specification. • 1984 FSO Polonez 2000 Turbo 3-door - rally car, never got rally homologation, bodywork like Coupé version, but without the Coupé-like front. This car received a turbocharged 1,995 cc Fiat engine, in some variants combined with a supercharger for better torque. • 1985 FSO Polonez - first five-door cars with a Coupé-like front :During 1985, the British importer introduced an upmarket version called the FSO Polonez Prima, which received black and gold sidestriping, a glass sunroof, and rear seatbelts among other extras. • 1986 FSO Polonez 1.5 Turbo mass production launched. Also, a rally version 1.5C Turbo known as "Iron Rain" official premiere. FSO Polonez - first cars with additional rear-side windows in the C-pillar. In 1987, the FSO Polonez 1.6 LE appeared. It has a 1,598 cc inline-four with at 5,200 rpm and at 3,800 rpm. Top speed is . There was also the rare FSO 125p 1.6 ME, with the same engine but a top speed of . Very few were made. FSO Polonez modifications: stamped rear spoiler instead of plastic one, new model labels on the sticking foil, new version coding system with an 'S' supposedly meaning that the car had the additional rear-side windows in the C-pillar, a feature was often broken in practice. The versions available were: 1,3 SCE, 1.3 SL, 1.3 SLE, 1,5 CE, 1.5 L, 1,5 LE, 1,5 SCE, 1,5 SL, 1,5 SLE, 1,6 SLE, 2.0 SLE In 1988, the FSO Polonez 1500 Turbo with AA 1,481 cc engine, at 7,000 rpm, at 3,200 rpm, 8,5 s, appeared. This was a rally version only, built to group A specifications. Following this competition version, the FSO Polonez 1.5 SLE Turbo with a turbocharged AA engine was introduced in December 1989. With a compression ratio of 8.5 to 1, the 1,481 cc inline-four produces at 6,000 rpm, and at 3,200 rpm. The zero to 100 km/h acceleration was in 11,0 s, and the top speed is . A catalyzed version with was also available. The Turbo Polonez' were built mainly in rally versions (group N), although on special order a Turbo-kit could be installed in mass-produced cars. • 1988 Prototypes of the FSO Polonez in an ambulance and van versions based on the FSO Truck (pick-up). Lowered chassis and an additional right-side door were added features. In 1989, the facelifted '89 FSO Polonez was introduced. Changes included a rear boot lid lowered to the bumper level, new rear lamps, a rear window wiper-washer placed horizontally, and side repeaters placed horizontally near the front doors. In January 1989, the first catalyzed Polonez (1500 only) was displayed at the Amsterdam Auto Show. Simultaneously, a version with an Italian FNM-built (Fratelli Negri Motori) turbo-diesel and a five-speed manual appeared (called the "Polonez Piedra 1.3 Turbodiesel"), specifically for the Belgian market. This engine has at 4,500 rpm, enough for a top speed of . In 1990, the FSO Polonez 2.0 SLE appeared, fitted with Ford's 2.0-litre engine, 12.5 seconds acceleration to 100 km/h and a top speed of .
Stratopolonez A unique version of FSO Polonez dubbed Stratopolonez (also known as FSO Polonez 2500 Racing) uses
Lancia Stratos components salvaged from a crashed car that was driven by Andrzej Jaroszewicz, the son of Prime Minister
Piotr Jaroszewicz in 1977 on
Rally Poland. He failed to complete the rally because of crashing into a tree. The resulting salvaged vehicle was designed by Ośrodek Badawczo-Rozwojowy FSO (FSO Research and Development Center) in 1978. The car uses an
FSC Star radiator located in the front (as a counterweight due to the vehicle being now mid-engined), engine output was improved to 280 PS, and does not share spoilers with
FSO Polonez 2000 Rally. This car was raced until 1985. Drivers were Andrzej Jaroszewicz, Adam Polak, Maciej Stawowiak, and Marian Bublewicz. Marian made improvements, such as adding wider rear wheel arches and strengthening areas around the windshield. The vehicle went to
Museum of Technology, Warsaw afterward. In 2000, the car was restored by Warsaw Motor Technical College students as part of their diploma thesis.
Gallery File:FSO Polonez MR'78 1500 Nowy Sącz 03-08-2013 02.jpg|FSO Polonez (1978 design, rear view) File:Beige FSO Polonez MR'83 1.5 L with rectangular headlights in Kraków.jpg|1983 FSO Polonez Lux File:FSO Polonez Coupe.jpg|The FSO Polonez Coupé, a limited edition File:POL Stratopolonez.JPG|The Stratopolonez used the mid-mounted engine from the
Lancia Stratos == Polonez Caro (1991–1997) ==