Nissan NA engine

The Nissan NA family of straight-four engines is a series of engines manufactured by Nissan (Nissan Machinery). It is the replacement of the Z series, on which its design is based, and is mostly used in commercial vehicles due to its use of Liquefied petroleum gas for fuel on engines with a "P" suffix code.

NA16S

 * Engine type: 1627 cc, 81.5x78 mm bore and stroke, SOHC
 * Output: 76 PS at 5,000 rpm
 * Torque: 12.8 kgm at 3,200 rpm

Applications

 * 1989–1995 Datsun Truck D21 73 PS
 * 1990–1995 Nissan Atlas F22 - F23

NA20P

 * Engine type: 1998 cc, 86x86 mm bore and stroke, SOHC, carburetted
 * Output: 82 PS at 4,600 rpm
 * Torque: 16.2 kgm at 2,400 rpm

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.
 * Output: 85 PS at 4,600 rpm
 * Torque: 17 kgm at 2,400 rpm

Applications

 * 1991–2010 Nissan Cedric Y31
 * 1993–2009 Nissan Crew K30
 * 1991–1999 Nissan Gloria Y31

NA20PE
This fuel injected, LPG-powered variant was introduced in September 2010 and met new, stricter emissions regulations.
 * Engine type: 1998 cc, 86x86 mm bore and stroke, SOHC, multi-point fuel injection
 * Output: 85 PS at 4,400 rpm
 * Torque: 17.3 kgm at 2,400 rpm

Applications

 * 2010–2014 Nissan Cedric Y31

NA20S

 * Engine type: 1998 cc, 86x86 mm bore and stroke, SOHC
 * Typical output: 100 PS at 5,000 rpm
 * Torque: 17 kgm at 3,000 rpm

Applications

 * 1989-1999 Datsun Truck D21, 91 PS at 5,000 rpm
 * 1990–1999 Nissan Atlas F22 - F23
 * 1990–1999 Nissan Atlas H40
 * 1990–1999 Nissan Homy / Nissan Caravan E24