Alfa Romeo Alfetta Turbodelta group B (1980)

Home » Rally Cars » Alfa Romeo Alfetta Turbodelta

turbodelta8.jpg Source


400 units built
Click here
Click here for street version

Group/Class 4/4 Homologation number: 668
Years active 1980-1981 Homologation start: 1/2/1980
Homologation end: 31/12/1981
Type Alfa Romeo Twin Cam, straight 4 cyl, 4 stroke, petrol engine located front longitudinally
Capacity 1962 cc WRC: x 1.4 = 2747 cc
Bore x Stroke (mm) 84.0 x 88.5
Compression ratio 7.0:1
Output power - torgue 175 HP @ 5500 rpm
280 HP @ 7000 rpm
230 lbf @ 3500 rpm
42 kgm @ 4000 rpm
Main bearings forged steel crankshaft with 5 main bearings 60mm diameter, big end journal diameter 50mm connecting rod length between centers 157mm, big end journal diameter 53.7mm, aluminium alloy piston 22mm pin diameter
Materials block: aluminium alloy with cast iron wet cylinder liners. 235mm deck height cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers
Cams/valves 2 overhead camshafts (DOHC), double chain driven 2 valves/cyl. - 8 valves total. 80o angle between inlet valve axis and exhaust valve axis
Aspiration 1 x K26-2470R4:11 turbocharger (aluminium alloy compressor 42.7/61mm diameter), 2 x Weber 40 DCOE, or Dellorto DHLA40H Carburetors pressure: 0.9 bar (street)
1.8 bar (racing)
Ignition Marelli electronic, firing order 1-3-4-2
Cooling system jacketed watercooled with pump, radiator, fan and thermostat
Lubrication system wet sump or dry sump with 1 oil cooler 11 lt
Type rear wheel drive 5 speed manual gearbox, located in front of rear axle, on same case with differential
Gearbox ratios 1st: 3.307/1 (43/13)
2nd: 1.956/1 (45/23)
3rd: 1.345/1 (39/29)
4th: 1.026/1 (39/38)
5th: 0.833/1 (35/42)
R: 2.62/1 (34/13)
1st: 2.57/1 (36/14)
2nd: 1.94/1 (33/17)
3rd: 1.55/1 (31/20)
4th: 1.22/1 (28/23)
5th: 1.00/1 (25/25)
R: 2.62/1 (34/13)
Diffrential ratio 4.10/1 (41/10), 4.56/1 (41/9), 5.12/1 (41/8) ZF hypoid spiral bevel gears 25% limited slip rear differential
Clutch dry double plate
Type steel monocoque chassis with front suspension cross-member sub-frame, roll-cage. 3 door steel coupe bodyshell
Front suspension double wishbones with lower 'A' wishbone and 2 upper 'L' links , lower longitudinal torsion bars, telescopic shock absorber and anti-roll bar
Rear suspension trailing semi-trailing arm with de dion tube 'dead' axle, watt's linkage, coil spring and telescopic shock absorber
Steering system rack and pinion (no servo) 3.5 turns lock to lock
Brakes front solid discs 255mm diameter with 2 piston calipers 48mm diameter, rear solid discs 255mm diameter with 2 piston calipers 38mm diameter. Ventilated discs all around 257mm diameter with 4 piston calipers 38/41mm diameter AP CP2270/71.
Rear discs are inboard located, in gearbox/differential case
dual circuit with vacuum servo, adjustable ratio split front to rear
length: 4345 mm (171.1")
4140 mm (163") no bumpers
width: 1664 mm (65.5") height: 1334 mm (52.5")
wheelbase: 2400 mm (94.5") front track: 1.360 m (53.5") rear track: 1.358 m (53.5")
Rims - tires 6 x 14". front 8x13", rear 10x13". Tarmac: Campagnolo magnesium, front 10x15", rear 12x15" 185/70-14", front Pirelli 245/45x13", rear 265/40x13". Tarmac: front 235/60x15", rear 295/61x15"
Weight 980 kg
Fuel tank 50 lt
Drag coefficient 0.39
turbodelta.jpg Source

Results in WRC


1980 Total
Total WRC results
Races/wins 1 1
Entries/finishes 2/0 2/0


Works team: -

Entry Rally event
Team M.C (SVE)
Entry list
Mauro Pregliasco
Vittorio Reisoli
Jolly Club fuel pump
Maurizio Verini
Bruno Scabini
Jolly Club fire
Starts/finishes 2/0 2/0

DMRF8AcX4AA6AfK.jpg Source
Mauro Pregliasco in San Remo '80


Alfetta-2-570.jpg Source


Alfetta_front_suspension_antiroll.jpg Source
int_fsus.jpg Source
Front suspension
int_susr.jpg Source
Rear suspension
Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License