The data indicates that all vehicles of the PEUGEOT 407 (2004-11) 4DR SALOON 2.0 HDI 136 ZENITH model in the sample are equipped with a diesel engine, accounting for 100% of the vehicles. Additionally, the engine capacity data is entirely focused on the year 1997, suggesting a consistent engine size across the dataset. This uniformity highlights that diesel engines are the exclusive fuel type for this model, and the engine capacity information may be aligned or comparable to engines from the 1997 era.