On average, modern diesel-powered cars in good condition can achieve fuel efficiency in the range of 15 to 25 km/L (35 to 59 mpg) in city driving and 20 to 30 km/L (47 to 70 mpg) on the highway. However, these values can vary significantly based on the factors mentioned earlier. For example, larger and heavier diesel vehicles, such as SUVs or pickup trucks, may have lower fuel efficiency than smaller and lighter cars.
For specific information about the fuel efficiency of a particular diesel-powered vehicle, it's best to refer to the manufacturer's specifications or conduct a fuel economy test under controlled conditions to obtain accurate measurements.
