Ferrari Colombo engine

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Colombo engine in a 1961 250TR Spider
Overview
Manufacturer	Ferrari
Production	1947–1988
Layout
Configuration	60° V12
Displacement	1.5 L (1,497 cc) 2.0 L (1,995 cc) 2.3 L (2,341 cc) 2.6 L (2,563 cc) 3.0 L (2,953 cc) 3.3 L (3,286 cc) 4.0 L (3,967 cc) 4.4 L (4,390 cc) 4.8 L (4,823 cc) 4.9 L (4,943 cc)
Cylinder bore	55 mm (2.2 in) 60 mm (2.4 in) 65 mm (2.6 in) 68 mm (2.7 in) 73 mm (2.9 in) 77 mm (3.0 in) 81 mm (3.2 in) 82 mm (3.2 in)
Piston stroke	52.5 mm (2.1 in) 58.8 mm (2.3 in) 71 mm (2.8 in) 78 mm (3.1 in)
Cylinder block material	Aluminium
Cylinder head material	Aluminium
Valvetrain	SOHC, 24-valve DOHC, 24-valve
Compression ratio	7.5:1 - 9.8:1
Combustion
Supercharger	Roots-type (in some versions)
Fuel system	Weber carburetor Bosch K-Jetronic FI
Fuel type	Petrol
Oil system	Wet sump Dry sump
Cooling system	Water-cooled
Output
Power output	116–395 hp (87–295 kW; 118–400 PS)
Torque output	90–240 lb⋅ft (122–325 N⋅m)
Chronology
Successor	Ferrari Lampredi V12 engine Ferrari flat-12 engine Ferrari F116 engine

The Ferrari Colombo Engine was a petrol fueled, water cooled, carburetted 60° V12 engine designed by Gioacchino Colombo and produced in numerous iterations by Italian automaker Ferrari between 1947 and 1988. The maker's first homegrown engine, its linear successor is the Lampredi V12,^[1] which it far outlived, the last Lampredi being made in 1959.

Colombo, who had previously designed Alfa Romeos for Enzo Ferrari, placed bore centres at 90 mm apart, allowing for significant expansion. Displacements ranged from the diminutive 1,497 cc (1.5 L; 91.4 cu in) debut that powered the 125S racer to the 4,943 cc (4.9 L; 301.6 cu in) unit in the 1986 412i grand tourer. Significant updates were made in 1963 for the 330 series, featuring a redesigned block with wider, 94 mm, bore spacing.^[2][3]

Enzo Ferrari had long admired the V12 engines of Packard, Auto Union, and Alfa Romeo^[4] (where he was long employed), but his first car, the 1940 Auto Avio Costruzioni 815, used a Fiat derived straight-8. Development of the V12 Colombo engine continued long after Colombo had been replaced by Aurelio Lampredi as the company's marquee engine designer. Although the Lampredi V12 was a real force for the company, it was Colombo's engine which powered Ferrari to the forefront of high-performance automobiles through the 1950s and 1960s.