How much performance has my Audi lost after 200,000 miles?

Audi A4 Mileage

Anyone who cares about their car wants to know that it is running efficiently and performing as it should. This can’t last forever though. Time will eventually take it’s toll: the engine parts will wear down the turbo will lose efficiency, fuel lines will clog up, air intakes become choked and even electric parts can deteriorate over time, all causing losses of precious horse power as well as fuel economy and emissions. Figures such as 1 BHP loss per year have been claimed. It’s now August 2019; my Audi A4 was first registered in Sep 2006 and has done almost 200,000 miles. Surely by now it will have experienced a considerable drop compared to when it was new. How much has it lost and what can I do about it?

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