Thin-Data Summary
Most dependable: Both Z8 engines are highly regarded. The S62B50 4.9‑litre V8 — shared with the legendary E39 M5 — is a masterpiece of naturally aspirated engineering, producing 400 hp and 500 Nm of torque. It is robust for a high‑output V8 but VANOS wear, timing chain guides, and oil consumption are well‑documented at higher mileages. The Alpina M62B48 is more relaxed, with 375 hp and 520 Nm torque, offering a smoother, more GT‑oriented driving experience. Buyers should prioritise a well‑maintained example with documented service history and evidence of VANOS maintenance.
