The provided data indicates that for the Audi A4 (2001-05) 5-door Avant 1.8T 190 Quattro Sport, the private sale price is consistently estimated at 100% within the £0 to £1,000 range. This suggests that, based on available data, these vehicles tend to be valued quite low in private sales, potentially reflecting their age, condition, or market demand. The data does not show any variation outside this range, implying a limited valuation spectrum for this specific model in private transactions.

Based on the available data, all sampled vehicles of the 'AUDI A4 (2001-05) 5DR AVANT 1.8T 190 QUATTRO SPORT' are manufactured in the year 2003. This indicates a strong concentration of this model within that specific year, suggesting that 2003 was a particularly prominent or popular production year for this vehicle variant.

The data indicates that the most common paint colour for the Audi A4 (2001-05) 5DR Avant 1.8T 190 Quattro Sport is silver, accounting for 43.5% of vehicles. This is followed by grey at 26.1% and blue at 13%. Less frequently seen colours include black (8.7%), green and red each at 4.3%. Overall, grey, silver, and blue are the predominant colours, suggesting a tendency toward neutral and classic shades for this model.

The data indicates that all models of the AUDI A4 (2001-2005) 5DR AVANT 1.8T 190 QUATTRO SPORT in the sample are equipped with an engine capacity of 1,781cc, and exclusively utilize petrol as their primary fuel source. This consistent specification suggests a uniform engine and fuel type across this vehicle variant in the dataset, which could be useful for prospective buyers or service providers seeking specific technical details about this model.