Fiat-Abarth 750

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The Fiat-Abarth 750 is a compact sporting series of automobiles manufactured by the Italian manufacturing firm Abarth & C. of Turin, Italy in the 1950s and 1960s. The cars used the floorpan and often the bodywork of the Fiat 600 but were fitted with Abarth's modified engines. Abarth also offered a number of bodyworks by other designers for the 750 and its derivatives, most famously Zagato but also Allemano and others.

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"Fiat Derivazione Abarth 750" logotype Fiat Abarth 750 (2).JPG
"Fiat Derivazione Abarth 750" logotype

There were also other derivatives, which were sold as the Fiat-Abarth 850, Fiat-Abarth 1000, and Abarth Monomille (1000 pushrod). For the 1960 Gran Turismo racing season the classes were changed to under 700 or under 1000 cc, while national competitions also featured an 850 cc class. Abarth responded with engines suitable for the new classes, although the 700 may have only been built in one or two examples. Depending on the state of tune, these then received additional letters to their names, such as TC or TCR. A twin-cam version, the "Bialbero", was also produced.

Abarth 210 A Spyder

Abarth's first model based on the Fiat 600 was the 210 A Spyder, which first appeared in late 1955 - soon after the introduction of the 600 itself. Using the standard 600's bottom plate and a modified engine, its sleek bodywork was by Boano. It has a low-cut windscreen, vestigial rear fins, and a single centre-mounted headlight. [1] The 633 cc (38.6 cu in) engine offers 32 CV (24 kW) while an enlarged 710 cc (43 cu in)39 CV (29 kW) option was also available. Both engines have a 9.5:1 compression ratio, dual exhausts, and reach their max power at 6900 rpm. Wheelbase is 195 in (4,953.0 mm) and dry weight 409 kg (902 lb); top speed for the larger model was claimed to be 150 km/h (93 mph). [1]

Abarth 215 A Coupé & 216 A Spyder

In 1956 Abarth presented twin concept models, based on the Fiat 600 chassis and its 747 cc (45.6 cu in) engine. Both were designed by Franco Scaglione at Bertone. Abarth 215 A Coupé was a closed variant presented at the Geneva Motor Show and the following open-top spider had its first premiere in Turin. Both cars had large protruding tailfins and pop-up headlights. [2]

750

Fiat-Abarth 750 Zagato " Double Bubble" Abarth Zagato 750.jpg
Fiat-Abarth 750 Zagato " Double Bubble"

Abarth offered their 750 cc derivative of the Fiat 600 both with the original ("Berlina") bodywork and with more slippery bodywork from others. Most famous is the aerodynamic Zagato-bodied range of Abarth 750 cars. As a footnote, failing Fiat modifiers Siata were owned by Abarth from 1959 until 1961. Siata's own 600-based "Amica" design and 735 cc (44.9 cu in) engine conversion was thus marketed as the Siata-Abarth 750 during those years, but there was little to no actual Abarth involvement with these cars.

750 Gran Turismo / Berlina

Appearing in early 1956, Abarth's 750 Gran Turismo Derivazione was the first Abarth product to use the standard Fiat bodywork. Fiat delivered these cars incomplete, to make it easier and more cost effective for Abarth to carry out their performance modifications. Rather than the 633 cc (38.6 cu in) original or Abarth's own 710 cc (43 cu in) model, the engine now displaced 747 cc (45.6 cu in) thanks to a one millimetre wider bore and a stroke increased by four millimetres (0.04 and 0.16 in respectively). Sharper cams, lighter flywheel, a bigger carburetor, and myriad other traditional tuning tricks were employed; as a result power nearly doubled, up from 21.5 to 40 CV (16 to 29 kW). Claimed top speed was 80 mph (129 km/h). [3]

750 Zagato

Originally the aerodynamic 750 Zagato "double bubble" had a single-cam engine. This was first presented at the 1955 Turin Motor Show. The original model was also offered in a more luxurious variant for export (called "America", as it was almost strictly meant for the United States) and a stripped down model with lower, uncovered headlamps and smaller taillights for the domestic Italian market. The "America" also has a different layout around the rear license plate. [4] The all-aluminium bodywork has Zagato's famous "double-bubble" design and Abarth's tuned derivazione engine with 43 CV (32 kW; 42 hp). Aside from the floorpan, not much of the Fiat 600 remains in use for these cars. By the time of the appearance of the Abarth Zagato Record Monza 750 Bialbero, the bodywork had been unified into a separate model with a rather large hump on the engine lid, made necessary by the taller twin-cam motor. There were then three distinct models: 750 "Double Bubble," 750 Record Monza, and 750 "Sestriere." The Sestriere had a single cam pushrod engine, and the majority were built with a steel body, a very small number of alloy cars, and there is one aluminium car known to exist today. The Sestriere had upright headlights, and two very large air intakes on the engine lid, much wider than a double bubble. (The Sestriere was believed to be the last model produced for Abarth by Zagato, due to disagreements between Abarth and Zagato.) [5] [6]

The 750 GT Bialbero model appeared at the 1958 Turin Auto Show; along with various alterations to the bodywork it has the new twin-cam engine with 57 CV (42 kW; 56 hp) at 7000 rpm. The Fiat 600 engine presented certain challenges for Gioacchino Colombo in designing a twin-cam head: an engine mount on the rear face of the engine blocked the natural routing for the cam chain, while other restrictions made it impossible to use a classic crossflow design; instead, the carburetors were mounted between the camshafts, on top of the engine, rotated about 45 degrees to provide access to the spark plugs. [7] This location no longer worked as the carburetors and inlets grew larger, and Abarth developed a distinctive banana-shaped intake manifold which allowed for two carburetors to be perched to either side above the engine. This, by necessity, made the Bialbero engine quite tall, necessitating sizable bulges and bumps in the bodywork on lower designs like the Zagato or various Spiders. [8]

The first Bialbero series constituted 100 cars, enough to homologate the car for the Gran Turismo competition category. [9] 750 Bialbero-equipped Fiat-Abarth Zagato Record Monzas featured a lower roof with no bubbles and one single centered air scoop on the engine lid. "The Record Monza" was the most successful racing Abarth in the USA with the Franklin D. Roosevelt Jr Racing team, (Abarth cars winning over 700 races worldwide), including both Sebring with the 750 cc (46 cu in) Bialbero engine and Daytona under-1,000 cc (61 cu in) races in 1959 widely believed to have had the first 982 cc (59.9 cu in) Bialbero engine.

There was also a very rare Zagato Spyder version produced, only between two and four examples are believed to have been built. [10] This model was first shown at the 1957 Turin Auto Show, and it was then shown again the next year. [10] The design has the usual sleek Zagato front end, with distinct fins at the rear. The bump on the engine lid came in for some period critique for disfiguring the overall design. [11] Max power from Abarth's 747 cc (45.6 cu in) engine is 44 CV (32 kW; 43 hp), enough for a top speed of 153 km/h (95 mph) in a period road test or 145 km/h (90 mph) according to Abarth themselves. [10] [11] [12] The Spyder's list price in Italy was the same as for the berlinetta Zagato, 1,535,000 Lira in 1958. [4] The 1958 Turin Show car had the twin cam engine, with similar performance to the berlinetta, although the "little castle" disfiguring the engine lid was even larger on this model. [13]

Abarth 700S

To suit newly reshuffled Gran Turismo racing categories, a 698 cc (42.6 cu in) version was introduced at the 1959 Turin Auto Show. The Twin Cam ("Bialbero") model produces 64 CV (47 kW; 63 hp) at 7,100 rpm. [14] One of these, with Zagato-style bodywork, did start at the 1960 Le Mans but it only managed 31 laps. This model may have remained a single example, while the 850 and 1000 models which arrived around the same time went on to be built for many more years.

850

850 Allemano

1961 Abarth 850 Allemano coupe 1961 Abarth 850 Coupe Allemano front view.jpg
1961 Abarth 850 Allemano coupé
1961 Abarth Cisitalia Spider Abarth Cisitalia Spider 1961 (6950667685).jpg
1961 Abarth Cisitalia Spider

The Abarth 850 Spider has bodywork by Allemano and was first shown in the spring of 1960. [15] The engine is a Fiat-based 850 single-cam unit which develops 52 CV (38 kW; 51 hp) CUNA at 6,000 rpm. Overall length is 3,600 mm (140 in), overall width is 1,420 mm (56 in), height is 1,200 mm (47 in), and the weight is 610 kg (1,345 lb). The claimed top speed is 154 km/h (96 mph). [15] A coupé model was also later developed, more elegant and comfortable than Zagato's version but heavier and less sporting.

Allemano's bodywork was later also made available with the larger 1000 engine. This bodywork was also used by Cisitalia's Argentinian daughter company, who built the car in a variety of models with 760, 800, or 850 cc engines.

850TC Berlina

Fiat-Abarth 850 TC
Fiat Abarth 850 TC (26442506461).jpg
Overview
Manufacturer Abarth
Production1961–1969 [16]
Body and chassis
Class Group 2 touring car [17]
Layout RR
Powertrain
Engine 847 cc I4
Transmission 4-speed manual
Dimensions
Wheelbase 2,000 mm (78.7 in)
Length3,530–3,607 mm (139.0–142.0 in)
Width1,390–1,499 mm (54.7–59.0 in)
Height1,301–1,400 mm (51.2–55.1 in)
Curb weight 585–610 kg (1,290–1,345 lb)

The Fiat-Abarth 850TC Berlina (Turismo Competizione, or "touring competition") was introduced towards the end of 1960. Originally built to Group 2 touring car specifications, it was manufactured between 1961 and 1969. [18] [19] It uses the Fiat 600 bodywork with some modifications, most notably a boxlike structure ahead of the front bumper which held the engine's oil cooler. The rear fenders were usually blistered, so as to accommodate larger wheels. The engine is a four-cylinder model based on a Fiat unit, with 847 cc capacity and 52 CV (38 kW; 51 hp) CUNA rating. Overall length is 3,090 mm (122 in), overall width is 1,400 mm (55 in), height is 1,380 mm (54 in), wheelbase is 2,000 mm (80 in), and its front and rear track are 1,160 mm (46 in). The fuel tank holds 5.9 imperial gallons. The 850TC remained in the price lists until 1966.

In 1962 the 850TC Nürburgring was introduced, with 55 CV (40 kW) at 6500 rpm. The name was intended to celebrate the class victory of an Abarth 850TC at the 1961 Nürburgring 500 km race. [20] There followed the 850TC/SS with two more horsepower; this was renamed the 850TC Nürburgring Corsa towards the end of the year.

Between 1962 and 1971 the 850cc and 1,000cc class cars won hundreds of races all over the World and were commonly called "Giant Killers" due to their superior performance over much larger cars. This culminated in a famous dispute with SCCA authorities in the USA when Alfred Cosentino (FAZA) was banned from running his 1970 Fiat Abarth Berlina Corsa 1000 TCR "Radiale" engine because his car was faster (mainly in wet conditions) than many of its V8-powered contemporaries. The SCCA authorities dictated FAZA and Cosentino be forced to use an earlier, non-Radiale, engine design from the 1962 model in their cars. They still achieved 51 victories from 53 races, the most victories in SCCA racing history, thereby cementing the superiority of the Fiat Abarth Berlina Corsa over larger and more powerful cars.

1000

1000 Zagato

The first Fiat 600-based Abarth to be fitted with the larger 982 cc development of the 600 engine was the Zagato-bodied Berlinetta, similar in appearance to the 750 and 850 Monza models. It was first shown at the October 1960 Paris Motor Show and produces 91 CV (67 kW; 90 hp) at 7,100 rpm. [21] Twin Weber carburetors and a 9.3 to 1 compression ratio help reach this considerable output for a one-litre engine. Claimed top speed is 205 km/h (127 mph). [21] A bewildering variety of slightly different bodystyle elements appeared over the years, with covered and uncovered headlights, different engine lids, taillights, and window arrangements, as well as a later long-tailed design which also received a longer nosecone. Since these cars were largely handbuilt and often to order, it is hard to say what is original and what may have been modified after many years of competition.

Monomille

The Monomille also has the pushrod 982 cc motor and was sold alongside the twin-cam Bialbero as a lower-priced, less complicated alternative. Bodywork was in the style of Zagato's, although it was executed by Abarth themselves. The cars carry a "Carrozzeria Abarth" badge.

1000 TC/TCR Berlina

It may seem strange that a 1000 cc economy car with 85 hp (63 kW) can be considered a racing car, but in its day, the Abarth 1000 TC and all its variants were fierce racing machines with international success and acclaim. The Fiat-Abarth 1000 TC [22] [23] is a special high-performance racing-oriented version of the Fiat 600, [24] designed and developed by Italian manufacturer Abarth, and built to Group 2 (and later Group 5) touring car specifications. The first 1000 TC was built in 1964; there was also a development called the 1000 TCR which used Abarth's Radiale cylinder head for even more power. [25] [26]

List of names

This is a list of the various models available that retained the standard "Berlina" bodywork: [27]

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References

  1. 1 2 "Abarth Activity". Road & Track. Abarth Gold Portfolio: 9. September 1955.
  2. ↑ "1956 Abarth 750 (Bertone)". carstyling.ru. Retrieved 29 November 2020.
  3. ↑ Wilkins, Gordon (July 1956). "Impressions: Abarth Fiat 750". Motor Racing. Abarth Gold Portfolio. UK: The British Racing & Sports Car Club: 11.
  4. 1 2 Marchianò, Michele, ed. (March 2013). "Il meglio di Quattroruote, Le Fuoriserie: 1958-1959" [The best of Quattroruote: Special models]. Galleria Ruoteclassiche (in Italian). 2 (55). Milan: Editoriale Domus: 35.
  5. ↑ "Driven by Design - Fiat-Abarth 750 Zagato". 14 December 2014. Retrieved 7 June 2022.
  6. ↑ "1959 Fiat Abarth 750 Zagato Coupe" . Retrieved 7 June 2022.
  7. ↑ Mallett, Delwyn (December 2004). "Hot Abarths". Octane . Vol. 2, no. 18. p. 94.
  8. ↑ Mallett, p. 95.
  9. ↑ Le Fuoriserie: 1958-1959 , p. 49
  10. 1 2 3 "Lot 107: 1958 FIAT-Abarth 750 Zagato Spider 100.316814" (Auction description). Monaco: Bonhams. 21 May 2007. Auction 15487. Retrieved 2014-06-18.
  11. 1 2 Le Fuoriserie: 1958-1959 , p. 25
  12. ↑ "1956 Fiat Abarth 750 GT Zagato". 20 April 2016. Retrieved 7 June 2022.
  13. ↑ Le Fuoriserie: 1958-1959 , p. 72
  14. ↑ Le Fuoriserie: 1958-1959 , p. 118
  15. 1 2 Marchianò, Michele, ed. (April 2013). "Il meglio di Quattroruote, Le Fuoriserie: 1960-1961" [The best of Quattroruote: Special models]. Galleria Ruoteclassiche (in Italian). 3 (56). Milan: Editoriale Domus: 19.
  16. ↑ "FIA Historic Database". historicdb.fia.com.
  17. ↑ "1963 ABARTH 850 TC". collectingcars.com.
  18. ↑ "Abarth 850 TC Berlina specs, performance data". FastestLaps.com.
  19. ↑ Perkins, Chris (April 11, 2019). "The Fiat-Abarth 850 TC Is a Little Car With a Big Sound". Road & Track.
  20. ↑ "Nürburgring 500 Kilometres 1961". Race Results. Racing Sports Cars. Retrieved 2014-06-10.
  21. 1 2 Le Fuoriserie: 1960-1961 , p. 39
  22. ↑ D, Nick (April 20, 2016). "1964 Fiat Abarth 1000 Berlina Corsa | Fiat".
  23. ↑ "1968 1000TCR GR.5 | Berni Motori | Abarth". www.bernimotori.com.
  24. ↑ Rees, Chris (February 3, 2022). "1970 Fiat-Abarth 1000 TC Corsa wide-body racer tested on track". Drives.today.
  25. ↑ "1966 Fiat-Abarth 1000 TC Corsa Saloon Chassis no. 100DS 2096251 and 210 1687 (Abarth) Engine no. A112A 20028081". Bonhams.
  26. ↑ "1970 Fiat Abarth TCR 1000 Berlina Corsa". Revs Institute.
  27. ↑ Nikolić, Dragan. "FIAT 600 / Abarth History". NOS Tubes. Retrieved 2014-06-17.
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