Toyota 1UR Series 4.6L V8 Naturally Aspirated Gasoline Engine

1UR‑FE (Sequential Multi‑Port Injection)

Basic Specs

• Displacement: 4,608 cc (4.6L)
• Layout: 90° V8, DOHC, 32 Valves (4 per cylinder)
• Bore × Stroke: 94.0 mm × 83.0 mm
• Compression Ratio: 10.2:1
• Block/Head: Die‑cast Aluminum Alloy
• Valvetrain: Dual VVT‑i (Variable Valve Timing‑intelligent)
• Fuel System: Sequential Multi‑Port Fuel Injection (SFI)
• Aspiration: Naturally Aspirated
• Ignition: Direct Ignition (DIS) with individual coils
• Timing Drive: Timing Chain
• Emissions: Water‑cooled EGR + Air Injection System
• Dry Weight: ~190 kg (419 lbs)
• Dimensions: L 740 mm × W 720 mm × H 720 mm

Performance

• Max Power:
  • 228 kW (310 PS / 306 hp) @ 5,500 rpm (Land Cruiser)
  • 218 kW (296 PS / 292 hp) @ 5,500 rpm (other applications)
  
  
• Max Torque:
  • 453 N·m (334 lb‑ft) @ 3,400 rpm (Land Cruiser)
  • 439 N·m (324 lb‑ft) @ 3,400 rpm (other applications)
  
  
• Fuel: Gasoline (95 RON+)
• Redline: 6,400 rpm

Applications

1UR‑FSE (D‑4S Direct Injection)

Basic Specs

• Displacement: 4,608 cc (4.6L)
• Layout: 90° V8, DOHC, 32 Valves
• Bore × Stroke: 94.0 mm × 83.0 mm
• Compression Ratio: 11.8:1
• Block/Head: Die‑cast Aluminum Alloy
• Valvetrain: Dual VVT‑iE (Electric Variable Valve Timing)
• Fuel System: D‑4S Direct + Port Injection
• Aspiration: Naturally Aspirated
• Timing Drive: Timing Chain
• Dry Weight: ~216 kg (476 lbs)

Performance

• Max Power: 285 kW (388 PS / 383 hp) @ 6,400 rpm
• Max Torque: 500 N·m (369 lb‑ft) @ 4,100 rpm
• Fuel: Premium Gasoline (98 RON+)
• Redline: 6,800 rpm

Applications

Key Features (Brochure Highlights)

• Lightweight Aluminum Construction: Reduced weight vs. iron‑block predecessors
• Dual VVT‑i / VVT‑iE: Optimizes valve timing for power, efficiency, and emissions
• ACIS: Acoustic Control Induction System for broad torque delivery
• ETCS‑i: Electronic Throttle Control System‑intelligent
• High Durability: Designed for heavy‑duty and luxury applications