2005 BMW Z4 Alpina Roadster S (E85) LUX

The E85 Z4 M Roadster (2006-2008) brought the E46 M3's legendary S54 engine to the Z4 platform. With 343hp, a six-speed manual, and limited-slip differential, the Z4 M delivered exceptional performance. The S54 engine is one of BMW's finest and rewards those who maintain it properly. Values are rising as appreciation for naturally aspirated M cars grows.

Engine: S54 requires specific care. Rod bearings must be inspected/replaced (£2000-3000). VANOS rattle. Throttle actuators. Subframe mounts (inherited E46 concern). Transmission: Getrag robust but check synchros. Rear diff: LSD needs oil changes. Roof: Check mechanism. General: S54 maintenance non-negotiable. Full specialist history essential.

Interlagos Blue or Imola Red, Extended leather, Full service history (critical), Rod bearings done, Low mileage