Fiat Abarth OT 850
|Vehicle technical details|
|Production:||1964 to 1966|
|Assembly plants:||Turin Italy|
|Body and chassis|
|Body styles:||sedan small car|
|Engine and Powertrain|
|Engine power:||32 to 51 kW|
|Weights and Dimensions|
The Fiat Abarth OT 850 , or alternatively as Fiat Abarth OT 850 , Fiat Abarth 850OT and internally Abarth (modello , Sigla or Tipo) 101 is a sporty small car model of the Italian car manufacturer Abarth ; as the entry-level model of the series, it was offered between 1964 and 1966 in different versions based on the Fiat 850.The Fiat Abarth OT 850 is based on the widely used Fiat 850 Berlina with rear engine and rear-wheel drive from 1964. .
The OT 850 is part of the series Fiat Abarth OT , which produced by the Turin company between 1964 and 1970. Among the OT models this was until 1966, when the new car sales of the 850 variant ended, in terms of displacement , power and price, the entry-level model. His closest relatives were the larger capacity and more powerful Fiat Abarth OT 1000 Berlina (1964 to 1966), which was led internally as Abarth Tipo 102 , andthe sportier Fiat Abarth OTR 850 (only 1966, Tipo 103 ).
The technical basis of the engine comes from the Fiat 850 Berlina with rear engine , rear-wheel drive and 34 hp (25 kW ). The OT 850 was developed in several versions as a production model with street legal for customers, a motor sport variant, however, only for factory purposes for testing.
Unlike the OT 1000 , This was only available with the two-door sedan body of the Fiat 850 Berlina , but not as a coupe or Spider . Feature of all OT 850 is the Abarth engine Sigla 201 with the unchanged displacement of the output model and continue to OHV valve control . The model was the successor of the smaller, lighter Fiat Abarth 850 TC , which was still based on the early Fiat 600 , and aimed specifically at customers who sought a combination of good performance and better family suitability.
In the production version with road legal approval of the OT 850 provides 44 or 53 hp (32 or 39 kW), in the racing version without street legal approval up to about 70 hp (51 kW).
Traditionally, Abarth had close contacts with Fiat ; As a result, pre-production vehicles of the Fiat 850 Berlina introduced in March 1964 were available at an early stage to develop the extensive Fiat Abarth OT series . The OT 850 saw Abarth as a sporting entry-level model for a larger series production, including for close-to-production motorsport by amateurs in the class up to 850 cubic inches of displacement. In the spring of 1964, Abarth, under the direction of chief engineer Mario Colucci and the head of engine development, Luciano Fochi , developed the Abarth Sigla 201 engineas road version and Sigla 201A as racing version . Both engine variants were designed with regard to the carburetor assembly , the exhaust manifold and the entire exhaust system on the space in the engine compartment of the sedan body. The original version with 44 hp (32 kW) debuted in May 1964. In the course of further developments, the oil cycle was optimized in November 1964; At the same time, the improved basic version was equipped with a more powerful, sporty version with 53 hp (39 kW). Parallel developed Abarth 1964 a racing version for internal testing.
From the OT 850 with limousine body went out in November 1964, the larger displacement and higher-drift production model OT 1000 Berlina ( Tipo 102 ) with 982 cubic centimeters, also as a test carrier in December 1964, first the Fiat Abarth OT 1600 Berlina ( Tipo 135 ) and at the beginning of 1965 the Fiat Abarth 2000 Berlina ( Tipo 136 ). In 1966, still followed in individual pieces of the Fiat Abarth OTR 850 with the special, from Abarth developed Radial - cylinder head , the 1965 Coupe OTR 1000 had its premiere.
The production of the OT 850 began in May 1964. Abarth received the starting vehicles individually or in spurts from the current Fiat production; took over their chassis numbers and supplemented them with their own shortcuts; a subsequent exact count is not possible. The production figures of the OT 850 fell far short of expectations. For some, its price premium compared to the standard Fiat 850 Berlina compared to the performance gain and the increase in the maximum speed appeared too high. In addition, Fiat had in the course of 1964 supplementing the competing 850 Superintroduced; this made by switching to super gasoline after all 37 (DIN) PS (27 kW) and was even available at the same price as the further offered weaker, but also more economical base model. Many Abarth customers therefore favored the larger and more powerful OT 1000 Berlina .
Against this background, series production of the OT 850 ended as early as the first months of 1965; Nevertheless, he stood until the model year 1966 in the Abarth price lists. It is unclear whether Abarth sold off only the remainder of the stock or even made the vehicles individually to order. In any case, the production of the complete OT 850 ended in 1966, when Abarth discontinued the last version with the sedan body of the Fiat 850 Berlina with the OT 1000 Berlina ; from the car program of the series OT remained until 1968 the OT 1000 Spider and until 1970 the OT 1000 Coupé and the OT 1300 Coupe . OT 850 could still be built by customers themselves in the following years by buying the individual conversion parts from Abarth and installing them themselves.
As an indirect successor to the Fiat Abarth OT 850 , the Fiat 850 Special, which was manufactured in early 1968 with the 47 hp (35 kW) engine of the Fiat 850 Coupe in mass production. As early as 1965, and until the early 1970s produced Giannini Automobili with headquarters in Rome a competitor to Fiat Abarth OT 850 , the Fiat 850 Giannini SL Sedan ; the engine made 48 hp (35 kW) at 5500 rpm.
The OT 850 is the only vehicle model that the short-stroke Abarth -Motor Sigla 201 uses a water-cooled 0.85-liter gasoline engine with four cylinders in series . As in the original model, a cylinder bore of 65.0 millimeters and a piston stroke of 63.5 millimeters resulted in a displacement of 843 cubic centimeters. For the original or from November 1964 the weaker version, the manufacturer put the power with 44 DIN PS (32 kW) at 5400 revolutions per minute, for the stronger to 53 hp (39 kW) at 6000 revolutions. The mixture preparation takes place over one Solex single carburetor 34PBIC . The top speed was Abarth first with "130 kilometers per hour", then for the weaker version with "over 130" and 135 km / h and for the stronger with "over 150" or last 150 km / h.
Only at first glance are similarities to the four-cylinder engine of the Fiat Abarth 850 TC with 847 cc displacement, which is based on the Fiat 600 as Sigla 214 . The crankshafts of both engine types have - as with the output motors from Fiat - different directions of rotation; In addition, the TC engine is still designed as Langhuber (62.5 mm bore × 69.0 mm stroke). The increase in output of the OT 850 compared to the Fiat 850 Berlina based primarily on a more powerful carburetor, special, from Abarthdeveloped and built attachments and classic tuning measures ; the Abarthspezifischen attachments include in particular the intake manifold , the exhaust manifold and the double-tube sports exhaust.
The OT 850 uses the suspension of the Fiat 850 with independent suspension . Because of the higher performance it is modified as with all versions of the passenger car series Fiat Abarth OT . The factory had the OT 850 12 inch high and 4 ½ inch wide Abarth - steel wheels with a chrome trim lid and Abarth logo to cover the hub and wheel bolts. For a surcharge, 13-inch alloy wheels were ex-factory several manufacturers to choose from. The standard tires had the format 145 × 12. The weaker version delayed front and rear with drum brakes, only the stronger with disc brakes front.
The wheelbase of 2027 millimeters and the track of 1150 millimeters at the front and 1160 millimeters at the rear correspond to the Fiat 850 Berlina and the conventional Fiat Abarth OT passenger cars. At the rear axle track width could be widened to 1,220 millimeters.
The OT 850 uses the standard body of the Fiat 850 Berlina . Externally, he differs from this in several small details; minor are the external differences to the OT 1000 Berlina .
At the front is the characteristic, large Abarth logo (seen from the front) asymmetrically mounted left, next to it is a narrow chrome trim with the inscription Fiat Abarth (without reference to the displacement). Abarth logos also adorn the front fenders, the hubcaps, the dashboard and a lettering also the tail. The standard steel wheels have oval vents. Other external features are the sports exhaust with two tailpipes and a modified oil pan of an aluminum alloy . Unlike the larger displacement version OT 1000 missing any external evidence of engine capacity.
Parallel to the road model Abarth developed the OT 850 Corsa , sometimes referred to as OT 850 Competizione . Internally the model carries the designation Tipo 101A and the further uprated engine the identification Sigla 201A . From this model, only individual vehicles for factory purposes, with the proven model 850 TC Nürburgring Corsa of the years 1963 and '64 and with the 850 TC Corsa the model years 1965 and '66 ( Sigla 214D / C-214D / F ) emerged on Base of the Fiat 600 D to compare. As a result, the TC asserted themselvesModels because of their about 40 kilograms lower weight, the more compact dimensions and the more favorable aerodynamics .
Accordingly, no factory operations of the OT 850 Corsa / Competizione documented, also no special motor sport homologation at the Commission Sportive Internationale (CSI), the approval authority of the Fédération Internationale de l'Automobile (FIA). However, customers could buy the racing components individually and install themselves. In terms of performance, the racing versions of the OT 850 were at about the same level as the respective 850 TC variants: about 64 hp (47 kW) at 7000 rpm in 1964 and about 70 hp (51 kW) at 8000 rpm in 1965 and '66.
In the Italian home market, the Fiat Abarth OT 850 initially cost 870,000 lire , while the original model Fiat 850 Berlina - as later the 850 Super - was available for 798,000 lire. With the revision to OT 850 / Oltre 130 in November 1964, the price remained unchanged. The more powerful OT 850 / Oltre 150 cost 1,100,000 lire, just as much as the OT 1000 Berlina ; However, both offered as opposed to the basic model as standard front disc instead of drum brakes. Surcharge-subject, however gladly selected accessories ex factory were light metal wheels of Amadori or Campagnolo for 23.500 Lire; Furthermore, various sports steering wheels with wooden wreath or leather casing were available at prices ranging from 17,000 to 22,000 lire.
Overview of the different versions
From the Fiat Abarth OT 850 emerged from the factory following variants:
- Fiat Abarth OT 850 (internally Abarth Tipo 101 ): From May 1964 Abarth made the base model with street legal and the two-door sedan body of the Fiat 850 Berlina in series. It had the Abarth engine Sigla 201 with 44 hp (32 kW), which allowed a top speed of 130 km / h;
- Fiat Abarth OT 850 / Oltre 130 (internally further Abarth Tipo 101 ): In November 1964, the slightly revised variant followed with small changes to the oil circuit, yet the same engine identification, and with unchanged performance, but a slightly higher top speed;
- Fiat Abarth OT 850 / Oltre 150 (internal also Abarth Tipo 101 ): In November 1964, the more powerful variant with 53 hp (39 kW) and street legal supplemented the model range (internally also referred to as engine Sigla 201 ); Abarth OT 850 Corsa (internally Abarth Tipo 101A ): For testing Abarth produced from 1964 in single pieces this variant for motor racing without street approval with the further uprated engine Abarth Sigla 201A .