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| Lancia V4 engine | |
|---|---|
 In Lancia'sFulvia model, the 1.3 litre V4 engine was mounted at a 45° angle. | |
| Overview | |
| Manufacturer | Lancia |
| Production | 1922-1976 |
| Layout | |
| Configuration | AllV4s at: 10°, 11°, 13°, 20° |
| Displacement |
|
| Cylinder bore |
|
| Piston stroke |
|
| Cylinder head material | Aluminum |
| Valvetrain | SOHC orDOHC |
| Compression ratio | 9.0:1 |
| Combustion | |
| Fuel system | Carburetor |
| Fuel type | Gasoline |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 28.8–132 PS (21–97 kW) |
| Chronology | |
| Successor | Lancia Flat-4 engine |
Italian automobile companyLancia was the first to manufacture cars withV4 andV6 engines in series-production. This started with a number of V4-engine families, that were produced from the 1920s through 1970s.
The Lancia V4 pioneered the narrow-angleV engine design, more recently seen in Volkswagen'sVR5 andVR6 engines. By using very shallow V-angles — between 10° and 20° — both rows of cylinders could be housed in an engine block with a singlecylinder head, like astraight engine. A determining characteristic was the use ofoverhead camshafts (either single or double), in which acamshaft would serve the same function for all cylinders — inboth cylinder banks.
The first V4 was used in theLambda from 1922 through 1931. It was a 20° narrow-angle aluminium design. All threeengine displacements shared the same long 120 mm (4.72 in) stroke, and all were SOHC designs with a single camshaft serving both banks of cylinders.
Engines:
The Lambda engine was updated for theArtena. Bore was set at 82.55 mm (3.25 in) as in the 2.6 L Lambda, but stroke was reduced to a more conventional 90 mm (3.54 in). Total displacement was 1.9 L (1,927 cc), with 55 PS (40 kW; 54 hp) produced at 4000 rpm.
An all-new V4 was designed for theAugusta. Produced from 1934 through 1938, the Augusta's engine displaced 1.2 L (1,196 cc) with a 69.85 mm × 78 mm (2.75 in × 3.07 in) bore and stroke. Power output was 35 PS (26 kW; 35 hp) at 4000 rpm.
The engine was redesigned again for 1936'sAprilia. The first-series cars used a 1.4 L (1,352 cc) version with a 72 mm × 82 mm (2.83 in × 3.23 in) bore and stroke. Output was 47 PS (35 kW; 46 hp) at 4300 rpm.
A second series was unveiled for 1939 with an enlarged 1.5 L (1,486 cc) engine. It did not share its predecessor's dimensions, with bore and stroke now at 74.61 mm × 85 mm (2.94 in × 3.35 in). Power output was nearly the same at 48 PS (35 kW; 47 hp).
A small V4 (tipo 100) powered the compact 1939Ardea. It was a 20° narrow-angle engine displacing just 0.9 L (903 cc). Bore and stroke were new again at 65 mm × 68 mm (2.56 in × 2.68 in), and output was just 28.8 PS (21.2 kW; 28.4 hp) at 4600 rpm. For the 1949tipo 100B power was increased to 30 PS (22 kW; 30 hp).
The V4 returned after the war with the 1953Appia. It featured an even narrower 10° cylinder bank and just 1.1 L (1,090 cc) of displacement, fitting below Italy's 1.1-liter tax threshold. An initial 38 PS (28 kW; 37 hp) of power grew to 43 PS (32 kW; 42 hp) in 1956. 48 PS (35 kW; 47 hp) was available in 1959.
Lancia's final V4 series were used in theFulvia, remaining in production up until 1976. Designed by Ettore Zaccone Mina, it used a narrow angle (13°) and was mounted well forward at a 45° angle. The engine was a true DOHC design with one camshaft operating allintake valves and another operating all exhaust valves.
Displacement began at just 1.1 L (1,091 cc) with 59 PS (43 kW; 58 hp) with a 72 mm × 67 mm (2.83 in × 2.64 in) bore and stroke. A higher (9.0:1)compression ratio raised power to 71 PS (52 kW; 70 hp) soon after.
The engine was bored to 76 mm (2.99 in) to enlarge engine displacement to 1.2 L (1,216 cc) for theCoupé model. This, and some tuning, raised output to 80 PS (59 kW; 79 hp), further enhanced up to 88 PS (65 kW; 87 hp) for the HF model.
The engine was re-engineered with a slightly narrower bank angle and longer 69.7 mm (2.74 in) stroke for 1967. Three displacements were produced: 1.2 L (1,199 cc) 74 mm (2.91 in) bore, 1.2 L (1,231 cc) 75 mm (2.95 in) bore, and 1.3 L (1,298 cc) 77 mm (3.03 in) bore. The latter engine is most common, with the first unit only sold in Greece. Three levels of performance were available: 87 PS (64 kW; 86 hp) for common 1.3 Liter (commonly imported in USA and described as "highly tuned" byRoad & Track at the time); 90 PS (66 kW; 89 hp) for its 1.3s evolution and 101 PS (74 kW; 100 hp) for the Rallye HF.
The engine was redone again for a newHF with an even narrower 11° cylinder bank and longer 75 mm (2.95 in) stroke for its final incarnation. A bore of 82 mm (3.23 in) gave it a displacement of 1.6 L (1,584 cc), and power shot up to between 114 and 132 PS (84 and 97 kW; 112 and 130 hp) depending on tune.
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