The Nissan RD engine series is basically a Nissan RB engine design, except that it is only a

single overhead cam An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

six-cylinder diesel engine. It was the successor to the Nissan LD and SD six-cylinder engines and was joined by the six-cylinder Nissan TD engine. From 1997 onwards the turbocharged versions were fitted with electronic fuel injection. The turbodiesel version known as the RD28T (or RD28ET with electronic fuel injection) and were also fitted to the Nissan Safari (also known as the Nissan Patrol) off-road vehicle. Since the Nissan RD engine is based on the Nissan RB engine, they have many similarities and many parts are interchangeable. The engine block was similar to the RB30 engine except it had more material, was heavier and had 85mm bore vs the 86mm bore of the RB30 and a 83mm stroke vs 85mm stroke. The cylinder head was of a non-crossflow design, meaning that the exhaust and intake ports were on one side of the cylinder head.

RD28

SOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion cha ...

, bore

RD28 Series 1

*12 valves (two per cylinder). When originally introduced, JIS gross were used rather than JIS net, meaning that early information claims and at the same engine speeds. at 4,800 rpm
at 2,400 rpm * Nissan Skyline R31 series 1985–1987 * Nissan Laurel C32 ~ C34 series 1986–1993 *

Nissan Cedric The is a large automobile produced by Nissan since 1960. It was developed to provide upscale transportation, competing with the Prince Skyline and Gloria which were later merged into the Nissan family. In later years, the Nissan Skyline was posi ...

/ Nissan Gloria Y30 ~ Y32 series 1985–1993 *Commercial (taxi)

/ Nissan Gloria Y31 series sedan 1987–1999 *

Nissan Crew The Nissan Crew is a mid-size sedan manufactured by Nissan, sold only in Japan and mostly used as taxicabs, driver training, and by law enforcement agencies as police cars. Its FR layout and simple construction created a steady following converti ...

K30 series 1993–1999 No PCV on the tappet cover.

RD28 Series 2

at 4,800 rpm
at 2,400 rpm *

/ Nissan Gloria Y32 & Y33 series 1993–1999 * Nissan Laurel C34 - C35 series 1994–1999

RD28E

at 4,800 rpm
at 2,400 rpm *Commercial (taxi)

Nissan Cedric Y31 The is a large automobile produced by Nissan since 1960. It was developed to provide upscale transportation, competing with the Prince Skyline and Gloria which were later merged into the Nissan family. In later years, the Nissan Skyline was posit ...

series sedan 1999.08-2002 * Nissan Laurel C35 series 1999–2001 *

K30 series 1999-2009 Vacuum pump located on tappet cover.

RD28T

turbodiesel at 4,400 rpm
at 2,400 rpm Nissan Safari Spirit series Y60 2-door soft-top 1996–1997

Nissan Civilian Bus , trading as Nissan Motor Corporation and often shortened to Nissan, is a Japanese multinational automobile manufacturer headquartered in Nishi-ku, Yokohama, Japan. The company sells its vehicles under the Nissan, Infiniti, and Datsun brands, ...

RD28ETi1

*electronically controlled turbodiesel with an

intercooler An intercooler is a heat exchanger used to cool a gas after compression. Often found in turbocharged engines, intercoolers are also used in air compressors, air conditioners, refrigeration and gas turbines. Internal combustion engines Mo ...

at 4,000 rpm
at 2,000 rpm Nissan Safari Spirit series Y61 2-door soft-top 1997–1999 ( automatic transmission)

RD28ETi2

*electronically controlled turbodiesel with an

at 4,000 rpm
at 2,000 rpm

References

RD Diesel engines by model Straight-six engines {{Automotive-part-stub