The Renault Z7X 726 is a 1,998 cc, inline‑four turbo‑petrol engine produced between 2020 and 2023. It features direct fuel injection, a twin‑scroll turbocharger, and dual overhead camshafts (DOHC). In standard form it delivers 205 kW (280 PS) and 400 Nm of torque, engineered for high‑performance dynamics with compliance to Euro 6d emissions.
Fitted exclusively to the Mégane R.S. and Mégane R.S. Trophy—including facelifted 2021–2023 variants—the Z7X 726 was designed…
All production years 2020–2023 meet Euro 6d (RDE Step 2) standards .
The Renault Z7X 726 is a 1,998 cc inline‑four turbo‑petrol engineered for the Mégane R.S. hot hatch (2020–2023). It combines direct injection with a twin‑scroll turbocharger to deliver high specific output and responsive power delivery across the rev range. Designed to meet Euro 6d (RDE Step 2), it balances track performance with road legality.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,998 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 82.0 mm × 94.0 mm | |
Power output | 205 kW (280 PS) | |
Torque | 400 Nm @ 2,400–4,800 rpm | |
Fuel system | Bosch HDP6 high-pressure direct injection (up to 350 bar) | |
Emissions standard | Euro 6d (RDE Step 2) | |
Compression ratio | 9.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Twin‑scroll turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN17 00 (SAE 0W‑20) | |
Dry weight | 136 kg |
The Renault Z7X 726 was used exclusively in the Mégane IV R.S. platform with transverse mounting and no external licensing. This engine received performance-specific adaptations—reinforced main bearings, forged pistons, and a dual-mass flywheel—and from 2022 the R.S. Trophy adopted updated camshaft and fuel system components, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The Z7X 726 offers exceptional performance and responsiveness, but early units (2020–2022) had high-pressure fuel pump drive lobe wear concerns under aggressive use. Post-2022 revisions improved camshaft durability. Longevity depends on using RN17 00 (0W-20) oil, adhering to 15,000 km oil changes, and using RON 98 fuel exclusively.
Top issues include exhaust camshaft-driven high-pressure fuel pump wear, GPF clogging, turbo wastegate actuator failure, and PCV oil separator degradation. These are documented in Renault service bulletins and correlate with DVSA MOT failure data for Euro 6 performance petrol engines.
The Z7X 726 powers the Mégane IV R.S. (2020–2023), including R.S. 280, R.S. 300, and R.S. Trophy variants. It is exclusive to Renault and not shared with Nissan, Dacia, or Alpine.
Aftermarket ECU tuning is common on the Z7X-726 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Official WLTP combined figures range from 8.1–8.8 L/100km (35–32 mpg UK). Real-world mixed driving typically yields 9.0–11.5 L/100km (31–25 mpg UK), depending on driving style, track use, and GPF regeneration cycles.
Yes. The Z7X 726 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic internal damage. However, the front-mounted chain design is generally robust with proper maintenance.
Renault specifies RN17 00-compliant 0W-20 low-SAPS synthetic oil. This is critical for GPF compatibility, turbocharger protection, and fuel pump drive lubrication. Change intervals should not exceed 15,000 km or 12 months, whichever comes first.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
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