2963
CM³
The Z7X is the 2,963 cc PRV V6 in Renault nomenclature — from the sensible 150 bhp of the American Eagles and Dodge to the 268 bhp of the Hartge-built Safrane Biturbo, via the Alpine A610's 250 bhp turbo.
Introduced with the 2,963 cc versions of the PRV, the Z7X powered Renault's flagships — Safrane, phase 1 Laguna — but also crossed the Atlantic under the bonnets of the Eagle Premier, Eagle Medallion and Dodge Monaco.
Its sporting summit is elsewhere: turbocharged to 250 bhp in the Alpine A610, and twin-turbocharged to 268 bhp by Hartge for the Safrane Biturbo — the full stories are in Tuners.
Hartge also built a 280 bhp Laguna Biturbo prototype on this block around 1995 — Renault declined to produce it. And remember: from 1997, the 60° L7X that replaced the PRV on these models is a different engine entirely.
The 2.5 turbo file, the 24-valve ZPJ4, and every known engine code.