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Alfa Romeo 33 Stradale

This article is about the road going version of Tipo 33 racing car. For the racing car, see Alfa Romeo Tipo 33. For the family car, see Alfa Romeo 33.
Alfa Romeo 33 Stradale
Overview
Manufacturer
Alfa Romeo
Production
November 1967 - March 1969
Assembly
Milan, Italy (Carrozzeria Marazzi)
Designer
Franco Scaglione
Body and chassis
Class
Sports car
Body style
2-door coupé
Layout
Rear mid-engine, rear-wheel drive
Related
Racing car: Alfa Romeo Tipo 33
Production car: Alfa Romeo Montreal
Powertrain
Engine
2.0 L V8
Transmission
Colotti 6-speed manual
Dimensions
Wheelbase
2,350 mm (92.5 in)
Length
3,970 mm (156.3 in)
Width
1,710 mm (67.3 in)
Height
991 mm (39.0 in)
Curb weight
700 kg (1,543 lb)
The Alfa Romeo 33 Stradale is a mid-engined sports car built by Alfa Romeo of Italy. "Stradale" (Italian for "road-going") is a term often used byItalian car manufacturers to indicate a street-legal (usually heavily modified and/or underpowered) version of a sports car. The car was introduced at the Sport Car Show at Monza, Italy in September 1967. Only 18 have been made. The prototype (chassis No. 750.33.01) was sold to private Gallery Abarth, Japan, a magnesium bodied Stradale replica (chassis No. 105.33.12) built in late 1970s and the five concept cars are now part of the Alfa Romeo Museum. In Top Gear's 100 Sexiest Cars list, the Alfa Romeo 33 Stradale was featured as number 15.
A twin headlight 33 Stradale can be seen in the 1969 Italian movie Un bellissimo novembre.

Derivation

The 33 Stradale, first built in 1967, was based on the Autodelta Alfa Romeo Tipo 33 racing car. The car, designed by Franco Scaglione, and built by Carrozzeria Marazzi, made its debut at the 1967 Turin Motorshow.

Price

Built in an attempt by Alfa to make some of its racing technology available to the public, it was the most expensive automobile for sale to the public in 1968 at US$17,000 (when the average cost of a new car in 1968 was $2,822). In the same year, in Italy, the retail price for a 33 Stradale was 9.750.000 lire. Just to make a comparison, the Lamborghini Miura was sold for 7.700.000 lire, while the average worker's wage was about 150.000 lire.

Features

The 33 Stradale is the first production vehicle to feature dihedral doors, also known as butterfly doors. The 33 Stradale also features windows which seamlessly curve upward into the 'roof' of the vehicle. The car has aluminium body on aluminium tubular chassis. As a result of being built by hand, each model differs from the others for some details. For example, early models had twin headlights, replaced in the last ones by single lights. The position of the windscreen wiper, and even the number of them, is another thing that differentiates each example from the others. Also the late models have vents added behind both the front and rear wheels to allow hot air from the brakes to escape.
The race-bred engine bore no relation to the mass-produced units in Alfa's more mainstream vehicles. Race engineer Carlo Chiti designed an oversquare (78 mm (3.1 in) bore x 52.2 mm (2.1 in) stroke) dry-sump lubricated all aluminum 1,995 cc (121.7 cu in) V8 that featured SPICA fuel injection, four ignition coils and 16 spark plugs. The engine used four chain-driven camshafts to operate the valve train and had a rev-limit of 10,000 rpm. The engine produced 230 hp (172 kW) at 8,800 rpm in road trim and 270 bhp (201 kW) in race trim. The engine valves are operated via chain-driven double-overhead cams and has a 10.5:1 compression ratio. Because every Stradale is hand built and unique the power levels can vary by car, used rpms etc., for example the first production Stradale (No. 750.33.101) has factory datasheet that claims 243 hp (181 kW) at 9,400 rpm with a "street" exhaust and 254 hp (189 kW) with open exhaust.
In another break from convention Alfa used, for the first time on a production car, a six-speed transaxle gearbox by Valerio Colotti. The car has 13-inch Campagnolo-made magnesium wheels and Girling disc brakes on all four corners, the rear ones are inboard type. Despite wheel diameter is just 13 inches the wheels are eight and nine inches wide, front and rear. Suspension is like in mid-1960s race car with upper and lower control arms in front and double trailing arms in the rear, along with substantial antiroll bars.
Although the Stradale is a road car, it has some limitations which may make the everyday use slightly hard, for example missing locks and the lack of ground clearance.
Specifications
Top speed
260 km/h (160 mph)
0–97 km/h (0-60 mph)
5.5 seconds
Type
90° V8 DOHC
Displacement
2.0 L 1,995 cc (121.7 cu in)
Power
230 bhp (170 kW) @ 8,800 rpm
Torque
200 Nm (150 lbft) @ 7,000 rpm

Performance

The car takes 5.5 seconds to reach 60 mph (96.6 km/h) from a standing start and has a top speed of 260 km/h (160 mph). In 1968 it was the fastest commercially available car in the standing kilometer with time of 24.0 seconds measured by German Auto, Motor und Sport magazine. Similar performance cars on that time were all using twice the Stradale`s cylinder capacity, theLamborghini Miura, Ferrari Daytona and Maserati Ghibli.

Value

The Alfa Romeo 33 Stradale are hardly ever traded; thus their value is very hard to estimate.

Concept cars based on 33 Stradale

Five 33 Stradales were dressed with individual bodies, which all are unique:

Bertone

  • Marcello Gandini designed the Carabo, a wedge-shaped coupe with scissor doors, in 1968 for Bertone. The car was built on the chassis No. 750.33.109.
  • In 1976 Bertone made the Navajo No. 750.33.117, a massively-acting closed coupe with angular contours and large roll bar.

Pininfarina

Pininfarina designed between 1969-1971 a total of three vehicles on two 33 Stradale chassis:
  • The P 33 Sport Roadster of 1968 was an open vehicle with a lower windscreen and a striking, painted in dark color roll bar. The vehicle used in the chassis No. 750.33.108. It was at the Turin Motor Show, presented to the public in November 1968. Its whereabouts are unclear. Partly it is considered that the body of the P 33 was removed after the public exhibition, the chassis and two years later with the body of the Cuneo had been provided.
  • The Prototype Pininfarina Speciale 1969 was a rotund coupe with gullwing doors, pop-up headlights and heavily glazed cockpit that some design ideas later Ferrari anticipated models. Use the vehicle chassis No. 750.33.115. It bore a striking yellow paint.
  • The Pininfarina Cuneo was an open, wedge-designed sports car that was presented at the Brussels Motor Show in January 1971 and probably also based on the chassis No. 750.33.108.

Italdesign

Italdesign, founded by Giorgio Giugiaro presented the Iguana at the Turin Motor Show in November 1969, it is a closed two-seater sports coupe with an unusually high hedge on the basis of the chassis No. 750.33.116. The design showed some new elements, that Giugiaro few years later introduced in production vehicle designs. Thus, the body of the Iguana was made of brushed steel, this concept Giugiaro realized later when De Lorean DMC-12 . The front end of the Iguana Giugiaro quoted in his designs for Maserati models Bora and Merak, and the rear end with the high-mounted tail lights were put into production in the Alfa Romeo Alfasud Sprint. Allegedly, a serial production of the Iguana was planned, the intention never realized, however.
Name
Designer
Debut
Image
Bertone
1968 Paris Motor Show
Alfa Romeo P33 Roadster G.S.
(was later rebodied into the Cuneo)
Pininfarina
1968 Turin Auto Show

Alfa Romeo Iguana
 Italdesign Giugiaro
1969 Turin Auto Show
Pininfarina
1969 Paris Motor Show
Alfa Romeo Cuneo
Pininfarina
1971 Brussels Motor Show

Bertone
1976 Geneva Motor Show


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Last updated on 3 April 2014 at 22:26.

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