So last Friday morning, we published a story regarding the reason why the 2020 Mitsubishi Montero Sport wasn't launched with a 4WD variant. According to the product planners at Mitsubishi Motors Philippines, the high-spec four-wheel drive versions gained a bit more extra weight that they had to delay its launch to Q1 of next year.

During the actual launch, we were able to speak with Koichi Namiki, the program head for Mitsubishi's frame-based vehicles, meaning he was in charge of the development of the Mitsubishi Strada, the Mitsubishi Montero Sport, as well as the newly re-launched and re-engined Mitsubishi L300. And now we were able to get a much more complete explanation as to why only the 2WD versions were launched for now.

According to Namiki, the extra features on the 2020 Montero Sport had in fact increased the weight of the SUV that it affected the emissions of the vehicle.

As we surmised in a previous story, the Mitsubishi engineer says that they wanted to give their customers the best features that they had available, so they kitted the GT 4WD with, well, everything. That includes the latest features like the Smartphone Display Audio 2 (SDA) with the Multi-Around Monitor (similar to Nissan's AVM), as well as much heavier systems like the power rear liftgate.

Montero Sport 4WD extra features affected emissions, confirms MMC engineer image

The program head says the effect wasn't much, but the weight was significant enough to push the engine to work harder; enough to actually push the engine to not meet Euro4 emissions standards.

A vehicle's emissions rating relies not only on the sophistication of the emissions control system, but also on the actual weight of the vehicle. The principle is simple: the heavier a vehicle is, the more effort it takes for the engine to move it, the more fuel is used. That leads to increased tailpipe emissions like carbon dioxide (CO2), nitrous oxide (Nox), carbon monoxide (CO), sulfur dioxide (SO2), so on and so forth.

We asked Namiki what they had to do to get the 2020 Montero Sport GT 4WD (probably GT Premium) to be compliant, and he says they didn't have to lighten the vehicle or delete features as we had hypothesized. Instead, Namiki says all they had to do was tweak the vehicle's emissions control system to get it to meet the proper rating.

That's why 4WD variants of the 2020 Montero Sport will be launched next year.