The data indicates that all Volvo S40 (2004-07) 4DR Saloon 2.0D SE Sport vehicles in the sample are powered exclusively by diesel fuel, with no petrol variants represented. Additionally, engine capacity data is only available for the 1997 and 1998 model years within the example, with 97.4% of these vehicles from 1998 and 2.6% from 1997, suggesting limited or no data for later model years in this particular sample. Overall, the vehicles appear to predominantly use diesel engines, with engine capacity information mostly relevant to earlier years.