Nissan RD engine
The Nissan RD engine series is basically a Nissan RB engine design, except that it is only a single overhead cam 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. RD28. RD28 Series 1. at 4,800  rpm at 2,400 rpm No PCV on the tappet cover. RD28 Series 2. at 4,800 rpm at 2,400 rpm RD28E. at 4,800 rpm at 2,400 rpm Vacuum pump located on tappet cover. at 4,400 rpm at 2,400 rpm RD28T. Nissan Safari Spirit series Y60 2-door soft-top 1996–1997 at 4,000 rpm at 2,000 rpm RD28ETi1. Nissan Safari Spirit series Y61 2-door soft-top 1997–1999 (automatic transmission) at 4,000 rpm at 2,000 rpm