| NA engine | |
|---|---|
 NA20P engine | |
| Overview | |
| Manufacturer | Nissan Machinery |
| Layout | |
| Configuration | Naturally aspiratedStraight-4 |
| Displacement | 1.6–2.0 L (1,627–1,998 cc) |
| Cylinder bore | 81.5 mm (3.21 in) 86 mm (3.39 in) |
| Piston stroke | 78 mm (3.07 in) 86 mm (3.39 in) |
| Valvetrain | SOHC |
| Combustion | |
| Fuel type | Gasoline Liquefied petroleum gas (in commercial vehicles) |
| Cooling system | Water-cooled |
| Output | |
| Power output | 76–100 PS (56–74 kW) |
| Torque output | 12.8–17 kg⋅m (126–167 N⋅m; 93–123 lb⋅ft) |
| Chronology | |
| Predecessor | Z series |
The NissanNA family of straight-four engines is a series of engines manufactured byNissan (Nissan Machinery). It is the replacement of theZ series, on which its design is based, and is mostly used in commercial vehicles due to its use ofLiquefied petroleum gas for fuel on engines with a "P" suffix code. It is entirely unrelated to the 1950sNAK engine.
In 1998 the NA20P was updated, with redesigned combustion chambers which increased power and torque while lowering fuel consumption. A new catalyst reduced emissions, making it the first LPG-engined passenger car to be designated a low-pollution vehicle in several Japanese cities and prefectures.[2]
This fuel injected, LPG-powered variant was introduced in September 2010 and met new, stricter emissions regulations.
