The Nissan Y40 is a 4.0 l (3988 cc) gasoline-fueled, 4-stroke, spark-ignition internal-combustion V8 automobile piston engine, manufactured by the Nissan Motor Company from 1965 through 1973. Nissan built its first V8, in 1965 for its President limousine. The Y engine has been succeeded by two families of V8, the VH series during the 1980s and 1990s and the new VK series, which is also used in select Infiniti models.
The Y40 engine has OHV cylinder head design with 16 valves (2 per cylinder) and a 4-barrel carburetor Hitachi KHA-342-IE with dual throat down draught. It produces 197 PS (195 HP, 145 kW) at 5000 rpm and 323 Nm (237 lb·ft) at 3200 rpm of torque.
The Nissan Y40 bore is 92 mm and stroke is 75 mm and the compression ratio rating is 9.0:1.
The breakdown of the engine code is as follows:
- Y – Engine Family
- 40 – 4.0 Liter Displacement
|Layout||Four stroke, V8 (90 °:)|
|Displacement||4.0 l, 3988 cc (243.4 cu in)|
|Fuel system||Carburetor: Hitachi KHA-342-IE|
|Power output||197 PS (195 HP, 145 kW) at 5,000 rpm|
|Torque output||323 Nm (237 lb·ft) at 3,200 rpm|
|Dimensions (L x H x W):||–|
Cylinder block and head
The Y40 engine has a cast-iron cylinder block with five main bearings. The cylinder bore is 92 mm (3.6 in) and the piston stroke is 75 mm (3.0 in).
|Cylinder block alloy||Cast-iron|
|Cylinder bore:||92 mm (3.6 in)|
|Piston stroke:||75 mm (3.0 in)|
|Valves:||16 (2 valves per cylinder)|
|Nissan President H150||1965-1973|
|Nissan Cedric Patrol Y130 (Police only)||1965-1971|