| Manufacturer: | Nissan (Nissan Machinery) |
| Production: | 1965–1989 |
| Configuration: | Naturally aspirated V8 |
| Valvetrain: | OHV 2 valves x cyl. |
| Compression: | 9.0:1 |
| Fueltype: | Gasoline |
| Fuelsystem: | 4-bbl. carburetor Electronic FI (since 1975) |
| Coolingsystem: | Water-cooled |
| Displacement: | 3988cc |
| Bore: | 922NaN2 |
| Stroke: | 752NaN2 |
| Power: | NaN0NaN0 |
| Torque: | NaN0NaN0 |
| Successor: | Nissan VH engine |
The Y engine is a family of V8 engines designed and produced by Nissan between 1965 and 1990 for limousines.
The Y40 was a water-cooled OHV V8 engine produced for the Nissan President limousine between 1965 and 1973. It displaces 3988cc with a bore and stroke of NaN2NaN2. It has 16 valves (two per cylinder) and a 4-barrel carburetor and 9.0:1 compression ratio. It produces at 5000 rpm and 2370NaN0 at 3200 rpm, a high point for Nissan at the time.
This V8 engine was developed before the merger with Prince Motor Company and was not directly related to Prince's W64 V8, used exclusively in the Prince Royal limousine.
This engine was used in the following vehicle(s):
The Y44 is an OHV V8, 16 valve, 4 barrel down draught carb engine produced for the Nissan President and since 1975 used electronic fuel injection. It produced at 4800 rpm and 3430NaN0 at 3200 rpm. In 1975, Nissan introduced its emission regulation technology called NAPS (Nissan Anti Pollution System).
This engine was used in the following vehicle(s):
The Nissan Y engine was replaced in 1990 with the Nissan VH engine.