Prince G-18

Prince G engine
Overview
Manufacturer	Prince Motor Company
Production	1955-1975
Combustion chamber
Configuration	I4 & I6
Displacement	Four-cylinder: 1.5L 1.6L 1.8L 1.9L 2.0L Six-cylinder: 2.0L 2.5L
Valvetrain	OHV (GA30, GA4, GB30) SOHC (all except GR-8, GA30, GA4, GB30) DOHC (GR-8)
Chronology
Predecessor	FG4A
Successor	L16 (G-16) L18 (G-18) L26 (G-20) S20 (GR-8)

The Prince G-series engine was the company's only straight-four and straight-six engines which began production in 1955. A number of variations were made, with both OHV and OHC heads. A diesel four-cylinder with 1862 cc was also built, called the D-6. The G series was used in the Skyline, the Laurel, and the Gloria from the 1950s to the early 1970s.

Note that, prior to its merger with Prince, Nissan also made a G series of engines. These are unrelated engines and are documented at the Nissan G engine page.

1484 cc diameter X stroke: 75.0 mm (3.0 in) x 84.0 mm (3.3 in), OHV

Renamed GA-30 in 1957

Applications:

1484 cc diameter X stroke: 75.0 mm (3.0 in) x 84.0 mm (3.3 in), OHV

1959 improvement on the GA-30; also known as FG4A-40

Applications:

1862 cc diameter X stroke: 84.0 mm (3.3 in) x 84.0 mm (3.3 in), OHV

Also known as FG4B-30

Applications:

1862 cc diameter X stroke: 84.0 mm (3.3 in) x 84.0 mm (3.3 in), OHV

Also known as FG4B-40

Applications:

The Prince G-1 was the improved GA-4, and was rated at 1.5 L, but displaced 1.5 L (1484 cc/90 in³) thanks to an entirely different 75 mm (3.0 in) by 84 mm (3.3 in) bore and stroke. This undersquare arrangement was similar to the designs Nissan licensed from Austin Motor Company, though this is probably coincidental. This engine was also an OHV design and power output was similar to the Nissan G at 73 hp (54 kW) and 87 lb·ft (118 N·m).

Applications:

The G-2 is a 1.9 L (1862 cc/113 in³) version used by Prince. Bore and stroke were square at 84 mm (3.3 in), and output was 96 hp (72 kW) and 113.5 lb·ft (153.9 N·m) with a 2 barrel carburetor. It was an improved version of the GB-4 and was introduced in 1962 and was installed in the S40 Prince Gloria. The G-2 was an OHV design.

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Wikipedia