The data indicates that among the sampled AUDI A4 S4 4DR Saloon 4.2 Quattro vehicles from 2001-2005, the majority were manufactured in 2003, accounting for 53.8%. Meanwhile, a significant portion, 46.2%, were built in 2004. Notably, there are no entries for 2001 or 2002, suggesting that these models from earlier years are either less common or less likely to be registered within the dataset. Overall, the data emphasizes a higher prevalence of vehicles manufactured in the later part of this range, particularly in 2003 and 2004.

The data indicates that the Audi A4 S4 (2001-05) 4DR Saloon with a 4.2-liter engine predominantly features the same engine capacity, with 100% of the vehicles having a 4163cc engine. Regarding fuel types, nearly all of these vehicles (99.2%) run on petrol, while a small fraction (0.8%) are bi-fuel gas models. This suggests that the 4.2L petrol engine is the standard configuration for this model, with minimal variation in engine size and very limited use of bi-fuel options.