Introduction Audi’s BCY engine was a 4.2-litre biturbo V8 engine which was introduced in the Audi C5 RS6. Based on the AQJ/ANK engine in the Audi C5 S6, key features of the BCY engine included its: Cast aluminium alloy block with a 90-degree ‘V’ angle; Die-forged steel crankshaft; Aluminium-silicon (‘Alusil’) cylinder head; Double overhead camshafts […]
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