Tech Savvy Isuzu RZ4E Diesel Motor Makes Its Way Under the Hood of the Philippine-Spec mu-X, D-Max

March 22, 2018

When it comes to diesel engines, Isuzu is one brand that seems to know its stuff quite well. So it doesn’t really surprise many that it will soon be fielding a new diesel motor in the country in the form of the RZ4E Blue Power diesel motor.  Introduced today by Isuzu Philippines Corporation, the new oil burner is set to debut in the Isuzu mu-X midsize SUV.

So what’s so special about this new diesel lump, you ask? For one, it displaces a mere 1,898cc or 1.9-liters. Don’t let the smallish figure fool you as it is capable of producing 150hp and 350Nm of torque—figures clearly in the 2.5-liter four-cylinder range. Moreover, Isuzu claims that this powerplant is way more efficient than the existing 2.5-liter diesels found in its line-up.

Tested under the watchful eye of the Automobile Assocation of the Philippines using Department of Energy parameters, the RZ4E equipped Isuzu mu-X LS-A MT was able to do 37.27km/L—a jump from the old mu-X 2.5-liter variant’s 32.60km/L. its mu-X LS-A AT version, meanwhile, did the same run netting 35.80km/L, which is likewise an improvement over its 2.5L AT counterpart’s 24.13km/L.

Isuzu credits these output and economy figures to cutting-edge technologies that have been put in place in the new engine. Diamond Like Coated piston pins, clothoid curve combustion chamber, newly designed connecting rods, and diamond like coated fuel injectors all ensure lower friction. This translates to better engine efficiency and performance.

This is complemented by a water-cooled Variable Geometry Turbocharger that promises improved throttle response at all speeds. In line with this, Isuzu promises ease of maintenance thanks to tech such as Hydraulic Valve Lash Adjuster, Single Accessory drive belt for the alternator and A/C, and a Cartridge-type Oil Filter for easier disposal.

As mentioned above, the RZ4E diesel mill will make its Philippine debut in the Isuzu mu-X and D-Max. replacing the existing 2.5-liter versions. Available in five cool colors, the mu-X can be had in the following variants:

  • Isuzu muX RZ4E 4x2 LS MT: P1,395,000
  • Isuzu muX RZ4E 4x2 LS-A MT: P1,570,000
  • Isuzu muX RZ4E 4x2 LS-A AT: P1,595,000

As for the D-Max, IPC will reveal its prices later on.

Photos: Randolph De Leon

About the Author

Mr. Gerard Jude Castillo
Gerard has been a self-confessed car nut ever since he was a little boy. As a grown-up, he indulges in his passion by collecting toy cars (which he started since childhood) and reading up on the latest cars out there.  As Associate Editor, he will ensure that you get your fill of the latest cars in the market, as well as a load of automotive features.