Alfa Romeo Giulietta Sprint group GT (1955)
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Home » Racing Sports Cars » Alfa Romeo Giulietta Sprint Tipo 750

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Chassis register
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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Click here and here for Sprint 1954
Click here for SVZ '56
Click here for Sprint '59 (Tipo 101.02)
Click here for Sprint Veloce '59 (Tipo 101.06)

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)
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, Giulia: 910 kg 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

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Jo Bonnier in Monte Carlo '58
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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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