Iso Rivolta IR 300
|Iso Rivolta IR|
|Body and chassis|
|Engine||5350 cc V8 Chevrolet|
The Iso Rivolta is a luxurious Coupé introduced in 1962 by Iso Automotoveicoli S.p.A. of Bresso, a suburb of Milan. Company chairman Renzo Rivolta and his colleague, former Ferrari engineer Giotto Bizzarrini saw it as a Gran-Turismo Car in the original sense of the term, designed for long and memorable journeys. For motor racing, however, the car was homologated not as a GT but as a Touring Car.
The manufacturer wanted the car to be known for its powerful engine, high quality of construction and elegant style. Expensive press-tool dies were produced, but volumes never justified the investment in presses to go with them, and for several years the dies were kept at the factory and periodically sent out to be fitted to a sub-contracted press in the area in order that a batch of body panels could be produced.
Engine and running gear
Although originally envisaged as a competitor for the elegant Fiat 2300 Coupé, the low sales volumes achieved by the Iso Rivolta 300 made it prudent to move the car and its price upmarket. A 5.4 litre V8 engine was fitted, similar to one of the units installed in the Chevrolet Corvette. The all-synchromesh four-speed gear change was operated with a central floor mounted stick shift.
The front wheels of the Iso Rivolta 300 are suspended by linkages of uneven length with a sway bar. The rear wheels are attached with twin trailing arms using a De Dion axle with a Watt's linkage. Coil springs and telescopic hydraulic shock absorbers are fitted to all four wheels. The recirculating ball steering system needs five turns from lock to lock: the turning circle is unusually large at approximately 12.5 meters. With a 7 ° 30 ' caster angle, straight-line stability is excellent even at 200 km/h (124 mph).
Interior & Exterior
The Bertone designed coupé has a wheelbase of 270 cm, which enables five people to sit in comfort. The interior is equipped with leather seats. The arrangement of steering wheel, gear shift, switches and pedals is considered as exemplary. When leaving the factory the Rivolta originally fitted Pirelli Cinturato 205VR15 tyres (CN72).
Technical data (1964)
|Engine:||Four stroke V8 (90°)|
|Cylinder capacity:||5350 cc (327 cu in)|
|Bore × Stroke:||101,6 × 8,255 mm (325.0 in)|
|Power at rpm:||220 kW (300 SAE-PS) at 5000||250 kW (340 SAE-PS) at 6000|
|Max. Torque at rpm:||488 Nm (SAE) at 3200||465 Nm (SAE) at 4000|
|Compression ratio:||10.5 : 1||11.25 : 1|
|Engine cooling:||Water cooling with pump and thermostat,
Cooler capacity 18 liters
|Transmission:||Four-speed transmission with floor shift,
Rear wheel drive, limited slip differential
|Brakes:||Hydraulic Servo-foot brake,
Disc brakes front and rear (rear discs mounted on the differential), mechanical handbrake on rear wheels
|Suspension front:||Double wishbone with stabilizer bar, coil springs|
|Suspension rear:||De-Dion axle with Watts link and double trailing links, coil springs|
|Body:||Mid Superior all-steel body on welded steel frame, two-door|
|Track front / rear:||1410/1410 mm|
|Tires:||185 HS 15|
|Dimensions L × B × H:||4760 × 1752 × 1,425 mm (56.1 in)|
|Weight empty (without driver):||1,590 kg (3,505 lb)|
|Maximum loaded weight:||1,840 kg (4,057 lb)|
|Acceleration 0 – 100 km/h:||8,4 s||7,9 s|
|Top speed:||218 km/h (135 mph)||228 km/h (142 mph)|
|Base price:||35.500 DM||36.250 DM|
Note: Technical data vary between the sources.
- Etienne Cornil Fuhr: Iso Rivolta. In: Motor Revue. Vereinigte Motorverlage, Heft 50, Sommerausgabe 1964, S. 42–45.
- Katalog 100 Sportwagen, Band 13, 11. Auflage. Gildeverlag, Alfeld 1964
- "Marbles and Motors: Trying a new luxury Iso". Motor. 1 March 1969. pp. 30–32.
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