Lancia D25 group S (1954)
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Specifications

4 units built
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Lancia Tipo D25, V6 (60o) cyl, 4 stroke, petrol engine
3750cc, 93.0 x 92.0 mm
8.6:1
300-305 hp @ 6500 rpm
aluminium alloy block and head
4 main bearings 69.9mm diameter, big end bearings 57.5mm diameter
DOHC chain driven, 2 valves / cylinder - 16 valves total
aspiration, natural with 3 x Weber 46 DCF 3
12V battery, firing order 1-4-3-6-5-2, 2 sparks per cyl Marelli CW300 or Champion NA12 or Lodge RL49
water cooled
dry sump

Lancia Tipo D25 Carrera, V6 (60o) cyl, 4 stroke, petrol engine
3464cc, 93.0 x 85.0 mm
8.6:1
280 hp @ 6500 rpm
aluminium alloy block and head
4 main bearings 69.9mm diameter, big end bearings 57.5mm diameter
DOHC chain driven, 2 valves / cylinder - 16 valves total
aspiration, natural with 3 x Weber 46 DCF 3
12V battery, firing order 1-4-3-6-5-2, 2 sparks per cyl Marelli CW300 or Champion NA12 or Lodge RL49
water cooled
dry sump

4 speed manual gearbox
1st: 2.588:1 (17/44)
2nd: 1.346:1 (26/35)
3rd: 1.033:1 (30/31)
4th: 0.848:1 (33/28)
Final drive, 4.200:1 (10/42), 4.444:1 (9/40), 4.667:1 (9/42), 4.100:1 (10/41), 3.700:1 (10/37), 3.900:1 (10/39), 4.000:1 (10/40), 5.000:1 (9/45)
Single, dry plate clutch
limited slip rear differential
Chassis steel tubular space frame, 2 door spyder aluminium bodyshell
Front suspension lower trailing arms, transverse semi-elliptic leaf spring, telescopic shock absorbers
Rear suspension DeDion axle, quarter elliptic leaf springs, telescopic shock absorbers
inboard drum brakes, all-round, front 340mm drum diameter, rear 340mm drum diameter
length 3800 mm (149.6 in)
width 1440 mm (57.6 in)
height 960 mm (37.8 in)
wheelbase 2300 mm (90.6 in)
track f/r, 1300 mm (51.2 in) / 1260 mm (49.6 in)
wheels, front 5K-16", rear 5.5K-16"
tires, front 6.00x16", rear 7.00x16"
750-760kg
fuel tank, 115 lt
drag coefficient 0.5


Results in WSCC

Season

Car entry, chassis number Car number/ result
Buenos Aires Sebring Mille Miglia Le Mans Tourist Trophy Carrera Pan
Team 1000km 12h 1600km 24h
Scuderia Lancia Co, D25-0002 #2, oil tank
Scuderia Lancia Co, D25-0004 #1, diffe rential
Statistics
Works Starts/finishes 2/0 2/0
Drivers Team entries and car number
Scuderia Lancia Co
Alberto Ascari 1
Luigi Villoresi 1
Juan Manuel Fangio 2
Eugenio Castellotti 2

ascari7.jpg Source
Tourist Trophy '54
D25.jpg Source
Tourist Trophy '54
lancia-d25-sport_3.jpg Source
1955 street version

Drawings

lanciad24cutaway_bruno_betti.jpg Source
lancia_d24_v6_1953-17718.jpg Source
lancia-d24-1954-mille-miglia.gif Source
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