Is the Audi RS4 a good investment?

The thesis

The last naturally aspirated V8 RS4, with 4.2-litre V8 (420hp), manual gearbox, and Avant practicality. ~10,900 built globally; manual RHD UK examples increasingly rare as many were auto. B7 is the analogue RS4 before turbocharging and dual-clutch gearboxes arrived. Values rising from £20k (2018) to £28k–£45k (2024) for lower-mileage manuals. Early cycle: broader market hasn't yet fully priced in last-of-breed status.