Engine specifications do not differ; it is the emission control equipment connected to the engine. Fuel quality is the determining factor for variations in kilometers per liter (km/l) values.
Let's examine a basic diesel engine dataset, such as the 1KD-FTV. In this dataset, there are two variable values mentioned: brake horsepower (bhp) and torque. Further exploration reveals that both values vary by region, while the engine's fundamental physical characteristics remain unchanged.
As mentioned earlier, if a UK model truck has an unaltered engine and emission control system, the fuel economy drop in Pakistan is indeed expected.
UK model diesel engines adhere to strict emission control regulations. The Diesel Particulate Filters (DPF) in UK diesel engines require regular MOT tests and replacement according to UK standards. Diesel fuel in the UK and the EU is subject to strict sulfur content control, such as EURO 5 and EURO 6 standards.
To simplify further, in Pakistan it's akin to how many Japanese Domestic Market (JDM) vehicles suffer from fuel economy drops, catalytic converter errors, and O2 sensor failures, all due to contaminated fuel quality.
The other member is absolutely right in requesting the vehicle's maintenance history if available
please read this for better understanding.
