Isotta Fraschini V.4

The Isotta Fraschini V.4 of 1916 was an Italian six-cylinder, water-cooled, in-line piston aero engine of World War I (the "V" denoted "Volo" or "flight"). Its construction was fairly typical of aircraft engines of the period with six cast-iron cylinders mounted in pairs with common heads. This engine was also produced by Alfa Romeo.

Applications:
CANT 7
Caproni Ca.3
Caproni Ca.30
Caproni Ca.33
Caproni Ca.34
Caproni Ca.35
Caproni Ca.36
FBA Type H
Macchi L.1
Macchi M.5
SIAI S.8

Specifications:

V.4b
Type: Six-cylinder, water-cooled, in-line piston engine
Bore: 130 mm (5.12 in)
Stroke: 180 mm (7.09 in)
Displacement: 14.3 L (874 cu in)
Length: 1,470 mm (58 in)
Width: 460 mm (18.11 in)
Height: 1,020 mm (40.15 in)
Dry weight: 264 kg (584 lb)
Valvetrain: Overhead camshaft
Fuel system: Twin carburettors, two six spark magnetos
Oil system: Forced feed
Cooling system: Water; cylinders in pairs, each pair in a steel water jacket
Power output: 142 kW (190 hp) at 1,450 rpm
Compression ratio: 4.8