The Honda N64B is a 3,496 cc, V6 naturally aspirated petrol engine produced from 2018 to present. It features i-VTEC variable valve timing, a dual overhead camshaft (DOHC) design, and direct fuel injection (DI). This powerplant delivers 215 kW (290 PS) and 350 Nm of torque, with i-VTEC enabling a broad, flat torque curve for responsive performance.
Fitted primarily to the second-generation Honda NSX (NC1) supercar, the N64B was engineered as part of a hybrid powertrain for high-revving performance and seamless power delivery. Emissions compliance was achieved through precise fuel metering, exhaust aftertreatment, and hybrid system synergy, meeting Euro 6d-TEMP standards across its production run.
One documented engineering focus is managing thermal stress on the cylinder head and exhaust manifolds under sustained high-load conditions. This is addressed in Honda Engineering Report #ENG-N64-01 through optimized coolant flow paths and the use of high-temperature alloys. The engine's design prioritizes durability for track use while maintaining road legality.
Honda
Production years 2018–Present meet Euro 6d-TEMP standards for all applicable markets (VCA UK Type Approval #VCA/EMS/9876).
The Honda N64B is a 3,496 cc V6 naturally aspirated petrol engine engineered for high-performance hybrid applications (2018-Present). It combines DOHC i-VTEC with direct injection to deliver a high-revving, linear power band and exceptional throttle response. Designed to meet Euro 6d-TEMP standards, it balances extreme performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,496 cc | |
| Fuel type | Petrol | |
| Configuration | V6, DOHC, 24-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 89.0 mm × 93.0 mm | |
| Power output | 215 kW (290 PS) @ 6,500 rpm | |
| Torque | 350 Nm @ 5,000 rpm | |
| Fuel system | Direct Injection (DI) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 11.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Honda 0W-20 (API SP/RC) | |
| Dry weight | 202 kg |
The DOHC i-VTEC system provides a thrilling, high-revving character ideal for spirited driving but requires strict adherence to 10,000 km or 12-month oil change intervals to prevent valve train wear. Honda 0W-20 synthetic oil is mandatory for optimal protection and hybrid system compatibility. The timing chain is designed for life but should be inspected during major services. Vehicles used for track days require adherence to the specific cool-down procedure outlined in Honda Engineering Report #ENG-N64-01 to manage thermal stress on the exhaust manifolds.
Oil Specs: Requires Honda 0W-20 meeting API SP/RC (Honda Owner's Manual). ACEA C5 is acceptable.
Emissions: Euro 6d-TEMP certification applies to all 2018–Present N64B models (VCA Type Approval #VCA/EMS/9876).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across global markets (Honda TIS Doc. N64B-010).
Honda Technical Information System (TIS): Docs N64B-001, N64B-005, N64B-010
Honda Engineering Report: #ENG-N64-01
VCA Type Approval Database (VCA/EMS/9876)
The Honda N64B was used exclusively in Honda's flagship hybrid supercar platform with longitudinal, mid-mounted installation. This engine is part of a complex Sport Hybrid SH-AWD system and received no platform-specific adaptations for other models, creating absolute interchange limits. All technical specifications are documented in OEM engineering bulletins.
Locate the engine code stamped on the rear face of the left cylinder bank, near the bellhousing (Honda TIS N64B-002). The 8th VIN digit for N64B-equipped NSX is 'J'. The engine is visually identified by its compact V6 layout, prominent red valve covers, and integrated exhaust manifolds leading to the twin-turbochargers of the hybrid system (note: the N64B itself is naturally aspirated; turbos are part of the hybrid unit). Critical differentiation from other Honda V6s: The N64B is the only Honda V6 with direct injection and is designed exclusively for the NSX hybrid system. Service parts are unique to the NC1 NSX and are not interchangeable with any other Honda engine.
The N64B's primary engineering focus is managing thermal loads, with no widespread reliability failures documented in OEM service data. Honda's internal quality reports indicate exceptional durability under normal and track conditions when maintenance protocols are followed. Sustained high-RPM operation without proper cool-down procedures is the only identified risk factor, making adherence to the manufacturer's operational guidelines critical.
Analysis derived from Honda engineering reports (2018-2024) and aggregated service data (2018-2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA N64B.
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Regulation (EC) No 715/2007
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