1500 (C10) G-16 inside diameter x stroke: mmin, SOHC maximum output (gross) @ 6000 rpm Maximum torque (gross) @ 4000 rpm The G-15 was bored out to form the G-16. Adapting the engine to more stringent US emissions was deemed too expensive, and it was replaced by the L16 engine in 1975. Applications: 1972-1975 Nissan Skyline 1600 (C110) G-18 The G-18 was a . Its bore was the largest in the range, and the stroke gave it good oversquare dimensions. It was an SOHC cross flow cylinder head design like the G-15 and produced and . This engine was discontinued in 1975 due to tightening emission regulations and replaced with the L18. Applications: 1968-1972 Nissan Skyline 1800 (PC10) 1968-1972 Nissan Laurel C30 1972-1975 Nissan Skyline 1800 (PC110) 1972-1975 Nissan Laurel C130 G-20 inside diameter x stroke: , SOHC Twin Barrel single Carburetor compression ratio 8.3:1 maximum output (gross) @ 5600 rpm maximum torque (gross) @ 3200 rpm Twin SU carburetor regular gasoline compression ratio 8.3:1 maximum output (gross) @ 5800 rpm maximum torque (gross) @ 3600 rpm Twin SU carburetor high octane gasoline compression ratio 9.7:1 maximum output (gross) @ 5800 rpm maximum torque (gross) @ 3600 rpm This engine was only used in the 1968-1975 C30 & C130 Laurel, and was discontinued in 1975 due to tightening emission regulations. Straight-6 Prince used a straight-6 version of the G family in their famous Skyline cars. All of the Prince straight-6 engines used single overhead cam heads. Engine displacement was kept below 2000cc to limit the amount of Road tax to be paid yearly in addition to other Japanese Government mandated expenses. G-7 The G-7 is a straight-6 version displacing . It was the engine of the GT-model Prince Skylines and was an OHC engine unlike the mainly-OHV family that spawned it. Bore and stroke were square at and power output varied with the carburetor equipped. Plain versions featured a 2 barrel carb and 8.8:1 for and , while the 1965 Skyline GT-B used 3 twin-barrel Weber carburetors and 9.3:1 compression for and . It was influenced by the Mercedes-Benz M180 straight six engine. The intake and exhaust manifolds are on the left side of the engine because Japanese drivers sit on the right side and the steering column would interfere, while the Mercedes-Benz engine places the intake and exhaust on the right side due to left hand driving conditions. Applications: