Alfa Romeo Giulietta Sprint group GT (1955)
Home » Racing Sports Cars » Alfa Romeo Giulietta Sprint Tipo 750
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Engine type
SVZ chassis
Targa Florio info
Specifications
Production numbers:
Giulietta Sprint 750B: 10507
Giulietta Sprint 10102: 15063
Giulietta Sprint Veloce 750E: 1366
Giulietta Sprint Veloce 10106: 1784
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Group | GT | |
---|---|---|
Homologation number | 121 | 123 |
Homologation start | 13/6/1956 | |
Model | Giulietta Sprint Veloce | Giulietta Sprint |
Chassis Type | AR1493E.00001 or AR155001 | |
Engine Type | AR1315.30001 or AR00106.00001 | |
Capacity | 1290 cc (74.0 x 75.0 mm) | |
Compression | 9.1:1 | 8.5:1 |
Aspiration | 2 x Weber 40DCOE or 40DCO3 carbs | 1 x Solex 35APAI-G carb |
Power output | 89 HP / 66 kW @ 6500 rpm | 79 HP / 59 kW @ 6300 rpm |
Torque | 108 Nm (80 ft·lb) (11 kgm) @ 4500 rpm | 98 Nm (72 ft·lb) (10 kgm) @ 3500 rpm |
Engine | |||||
---|---|---|---|---|---|
Type | Alfa Romeo Twin Cam 1315 or 00106, straight 4 cyl, 4 stroke, petrol engine | located front longitudinally vertical | |||
Capacity | 1290 cc | ||||
Bore x Stroke (mm) | 74.0 x 75.0 | ||||
Compression ratio | 9.1:1 | ||||
Output power - torgue | 89 HP / 66 kW @ 6500 rpm | 108 Nm (80 ft·lb) (11 kgm) @ 4500 rpm | |||
Main bearings | forged steel crankshaft with 5 main bearings 57/60mm diameter | connecting rod big end bearing diameter 45mm, aluminium alloy piston with 44.7mm compression height | |||
Materials | block: aluminium alloy engine block with cast iron "wet" cylinder liners | cylinderhead: cross flow aluminium alloy head with hemispherical combustion chambers | |||
Cams/valves | dual overhead camshafts (DOHC), direct valve actuation with bucket tappets driven by a double row timing chain | 2 valves/cyl. - 8 valves total. 37.15mm inlet valves diameter, 34.15mm exhaust valves diameters. 80o angle between inlet valves axis and exhaust valves axis | |||
Aspiration | natural with 2 x Weber 40DCOE or 40DCO3 carburetors | ||||
Ignition | firing order 1-3-4-2, 12V battery, 50 Ah, 240 W dinamo | ||||
Cooling system | jacketed watercooled with pump, radiator, fan and thermostat | 7.5 lt | |||
Lubrication system | flat, finned oil sump | 7 lt | |||
Transmission | |||||
Type | rear wheel drive | Borg Warner, 4 speed manual gearbox | |||
Gearbox ratios | Sprint & SV: constant: 1.75/1 (35/20) 1st: 3.313/1 (36/19) 2nd: 1.959/1 (29/26) 3rd: 1.354/1 (24/31) 4th: - R: 3.25/1 |
constant: 1.41/1 (31/22) 1st: 3.26/1 (37/16) 2nd: 1.99/1 (31/22) 3rd: 1.36/1 (26/27) 4th: - R: 3.25/1 |
1963: constant: 1.30/1 (30/23) 1st: 2.54/1 (35/18) 2nd: 1.70/1 (30/23) 3rd: 1.26/1 (26/27) 4th: - R: 3.01/1 (30/13) |
1963: constant: 1.30/1 (30/23) 1st: 3.30/1 (38/15) 2nd: 1.99/1 (32/21) 3rd: 1.36/1 (27/26) 4th: - R: 3.01/1 (30/13) |
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Diffrential ratio | 4.10/1 (41/10), 4.555/1 (41/9), 5.125/1 (41/8) | hypoid spiral bevel gears rear differential | |||
Clutch | dry single disc 200mm diameter | ||||
Chassis-body | |||||
Type | steel monocoque Tipo 750E or 1959: 10102 (Sprint) or 10106 (Sprint Veloce) chassis. 2 door coupe steel bodyshell with steel doors, steel front/rear bonnets, steel bumpers | ||||
Front suspension | double unequal-length A-arms, coil springs and anti-roll bar | ||||
Rear suspension | Live/rigid axle with single lower trailing arms, upper triangulated link from floorpan to differential housing and coil springs | ||||
Steering system | globe-shaped screw and roller (no servo) | 3 turns lock to lock | |||
Brakes | front drums 267mm diameter and 70mm width, rear drums 254mm diameter and 44.5mm width with 1 double cast iron piston caliper 22.2mm diameter. 1966, Giulia: front solid discs 270mm diameter with cast iron caliper 1 x 53.8mm diameter on one side and 2 x 38.1 mm diameter on the other side of the disc. |
dual circuit | |||
Dimensions | |||||
length: 3980 mm (156.7") | width: 1540 mm (60.6") | height: 1350 mm (53.1") | |||
wheelbase: 2380 mm (93.7") | front track: 1292 mm (50.9") | rear track: 1270 mm (50.0") | |||
Rims - tires | 4.5J x 15" | 155-R15" | |||
Weight | SV: 770kg | distribution, 54%/46% front/rear | |||
Fuel tank | 80 lt | ||||
Drag coefficient |
Results in WSCC
Season
Car entry, chassis number | Car number/ result | ||||||||
Buenos Aires | Sebring | Mille Miglia | Le Mans | Tourist Trophy | Targa Florio | ||||
Team | 1000km | 12h | 1600km | 24h | |||||
Mario Baratti/ Guido Archetti | #225, dnf | ||||||||
Bruno Grazioli Vicenza/ Giancarlo Gabaldo | #227, dnf | ||||||||
Lucillo Sacchiero/ Alessandro Tamellini | #228, 51st | ||||||||
Albino Buticchi | #229, 32nd | ||||||||
Mario Braida/ Giacinto Bovio | #230, 75th | ||||||||
Santo Ciocca | #232, dnf | ||||||||
Agostino di Stefano | #233, 130th | ||||||||
Bruno Momigliano | #236, in entry list | ||||||||
Egidio Gorza/ Umberto Carli | #240, in entry list | ||||||||
Carlo Camisotti/ Mario Sacchiero | #241, 113th | ||||||||
Lino Franceschetti | #242, dnf | ||||||||
Oscar Cabalén/ Ottavio Guarducci | #243, 56th | ||||||||
Aldo Bini/ Giampiero Chini | #245, dnf | ||||||||
Giuseppe Sgorbati/ Eugenio Freschi | #246, dnf | ||||||||
Luciano Gianni/ Paolo Campi | #247, dnf | ||||||||
Giulio Musitelli/ Ferruccio Musitelli | #248, dnf | ||||||||
Franco Torresi | #249, dnf | ||||||||
Ezio Bricarello/ Marco Vannucci | #250, dnf | ||||||||
Aurelio Somaglino/ Ugo Ponti | #251, 54th | ||||||||
Carlo Guidetti/ Franco Maioli | #252, dnf | ||||||||
Fausto Simmi | #253, in entry list | ||||||||
Giovanni Ceccaroni/ P. Manunzi | #255, dnf | ||||||||
Pier Giacomo Ghittoni/ Alberto Massari | #256, dnf | ||||||||
Giampiero Chini | #259, in entry list | ||||||||
Nicola Modugno/ Waldemar Merloni | #300, dnf | ||||||||
Paul Ernst Strähle/ Viktor Spingler | #301, dnf | ||||||||
Giuseppe Romano/ Fulvio Bresciani | #302, dnf | ||||||||
Scipione Paon/ Alberto Pontirolli | #303, 121st | ||||||||
Ignazio Scaletta/ Giovanni Piero Costa | #304, dnf | ||||||||
Mario Paglia/ Achille Togni | #305, dnf | ||||||||
Angelo Bersani/ Portos | #306, in entry list | ||||||||
Silvio Stoia/ Giulio Maran | #308, in entry list | ||||||||
Giorgio Becucci (group S) | #550, dnf | ||||||||
Nando Pagliarini/ L. Cavatorta (group S) | #559, 91st | ||||||||
Franco Bertani | #18, dns | ||||||||
Statistics | |||||||||
Starts/finishes 28/9 | 27/9 | 1/0 |
Source
Jo Bonnier in Monte Carlo '58
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Source
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Sprint Veloce
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Sprint Veloce Zagato (SVZ) '56 tipo 750 Alleggerita (Lightweight)
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Sprint Veloce Zagato (SVZ) '56 tipo 750 Alleggerita (Lightweight)
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Engine block
Drawings
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page revision: 204, last edited: 06 Apr 2020 05:10