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Toyota 8NR-FTS Specifications
| Engine Model: Toyota 8NR-FTS |
| Engine Type: 4-cycle inline 4-cylinder DOHC VVT-iW turbocharged liquid-cooled gasoline |
| Total Displacement: 73 cu.in (1.19 L) |
| Rated Engine Power: 116 Hp (85 kW) at 5600 rpm |
| Fuel System Type: Toyota D-4T dual fuel injection |
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| General Technical Data |
The Toyota 8NR-FTS is a 1.2-liter inline four-cylinder turbocharged gasoline engine belonging to Toyota’s NR engine family. Introduced in 2014, it represented Toyota’s entry into the downsized, direct-injected, turbocharged engine category, developed in cooperation with Denso and incorporating advanced thermal and combustion efficiency technologies. The 8NR-FTS was primarily used in compact and mid-size vehicles such as the Toyota Auris, Corolla, C-HR, and Lexus CT200h derivatives in certain markets.
This engine combined a small displacement with
turbocharging, variable valve timing on both camshafts (Dual VVT-iW),
and direct plus port fuel injection (D-4T system). The “W” in VVT-iW
refers to the wide-range variable valve timing on the intake camshaft,
allowing both conventional Otto cycle and modified Atkinson cycle
operation for improved efficiency. The design emphasized low-end torque,
high fuel efficiency, and reduced emissions while maintaining refined
operation and reliability expected from Toyota engines.
The 8NR-FTS succeeded naturally aspirated NR-series engines by
introducing forced induction and a cooled exhaust gas recirculation
(EGR) system for enhanced efficiency. In 2018, Toyota revised the engine
to comply with Euro 6d-TEMP emission regulations, improving catalytic
performance, injection precision, and overall thermal management.
The Euro 6 update also refined the turbocharger
design, adopted an electric wastegate actuator, and modified the
combustion chamber and piston crown shape to optimize fuel-air mixing
and reduce knocking tendency. With these refinements, the 8NR-FTS
maintained Toyota’s reputation for smooth, durable engines while meeting
modern emissions and performance standards.
The Toyota 8NR-FTS has a total displacement of 1197 cc (1.197 liters or
73.0 cubic inches). Bore is 71.5 mm (2.81 inches) and stroke is 74.5 mm
(2.93 inches), resulting in an undersquare design optimized for
mid-range torque. The compression ratio is 10.0:1 on early models and
increased slightly to 10.5:1 on later Euro 6 versions due to improved
combustion efficiency. The engine employs an aluminum alloy block with
cast iron cylinder liners and a die-cast aluminum cylinder head.
The block design incorporates an open-deck
structure for improved cooling and reduced mass. A forged steel
crankshaft runs on five main bearings, and the pistons are lightweight
aluminum with low-friction molybdenum-coated skirts. Friction reduction
was a key design priority, achieved through offset piston pins, reduced
tension piston rings, and roller rocker arms.
This inline-four engine operates with dual overhead camshafts (DOHC) and
four valves per cylinder, for a total of sixteen valves. Both camshafts
are chain-driven, with hydraulic tensioners maintaining precise timing.
Toyota’s Dual VVT-iW system adjusts the intake cam phase over a wide
range, allowing late intake valve closing for Atkinson-cycle operation
during light load and normal timing for Otto-cycle operation at higher
load.
The exhaust cam features conventional continuously variable timing. Maximum power output for early production units is approximately 85 kW (116 Hp or 114 bhp) at 5200–5600 rpm, while torque peaks at 185 Nm (136 lb-ft) from 1500 to 4000 rpm. Later Euro 6 versions retain the same nominal output but with smoother torque delivery and reduced CO emissions. The firing order is 1-3-4-2, and the idle speed is electronically controlled around 680–750 rpm.
| Fuel System |
The Toyota D-4T system used in the 8NR-FTS combines both direct and port fuel injection. Under high-load conditions, direct injectors deliver fuel directly into the combustion chamber at pressures up to 20 MPa (2900 psi), providing cooling and improved volumetric efficiency. Under light load or low-temperature operation, port injectors supply fuel to the intake ports, reducing particulate formation and keeping intake valves clean. The high-pressure fuel pump is camshaft-driven, while an electric low-pressure pump in the tank feeds fuel to the system.
Fuel pressure and injector timing are precisely managed by the engine control unit (ECU), which uses data from multiple sensors—mass air flow, manifold pressure, knock, and oxygen sensors—to achieve optimal combustion. The system operates on unleaded gasoline with a minimum octane rating of 95 RON (91 AKI). Fuel economy in typical applications ranges between 5.0–6.0 L/100 km (47–56 mpg UK, 39–47 mpg US) depending on vehicle and transmission type.
| Lubrication System |
The lubrication system is a fully pressurized wet sump type employing a trochoid oil pump driven by the crankshaft. The oil circuit feeds the crankshaft journals, connecting rods, camshafts, turbocharger bearings, and valve train components. Oil jets cool the underside of each piston. A full-flow oil filter with bypass valve ensures continuous lubrication even under high-load or cold-start conditions.
Oil capacity is approximately 3.9 liters (4.1 US quarts, 3.4 Imperial quarts). Recommended oil grade is SAE 0W-20 or 5W-30 meeting API SN or ILSAC GF-5 standards. Normal oil pressure at 3000 rpm is around 400–600 kPa (58–87 psi). The crankcase ventilation system uses a PCV valve integrated in the cam cover to manage blow-by gases and maintain low emissions.
| Cooling System |
A liquid cooling system with an electric water pump maintains optimal operating temperature. The thermostat opens at 82°C (180°F) and is fully open by 95°C (203°F). The total coolant capacity is approximately 5.8 liters (6.1 US quarts, 5.1 Imperial quarts). The radiator is aluminum with integrated electric fans controlled by the ECU based on coolant temperature, air conditioning demand, and vehicle speed.
Later Euro 6 versions feature a split cooling circuit with an additional bypass to accelerate warm-up, improving fuel economy and emissions. The coolant mixture recommended is 50% ethylene glycol antifreeze and 50% distilled water, offering freeze protection to –35°C (–31°F). The expansion tank and pressure cap are rated at 108 kPa (15.6 psi).
| Turbocharging System |
The 8NR-FTS employs a single-scroll turbocharger integrated with the exhaust manifold. The turbine housing is cast directly into the cylinder head for compactness and rapid heat-up of the catalyst. A water-cooled bearing housing and oil lubrication system ensure long life. Boost pressure is controlled by an electronically operated wastegate actuator in later versions (vacuum type in early units).
Maximum boost pressure is approximately 1.1 bar (16 psi). The intercooler is air-to-air type, front-mounted, and efficiently cools the compressed intake charge to enhance density and reduce knock tendency. The combination of a small, responsive turbocharger and direct injection allows high torque at low engine speeds with minimal lag.
| Intake and Exhaust Systems |
The intake system includes a plastic composite intake manifold tuned for low and mid-range torque. The electronically controlled throttle (ETCS-i) provides precise air metering. A variable geometry tumble control valve in the intake improves charge motion under low-load operation. The air filter is a dry element type, replaced every 20,000 km (12,000 miles).
The exhaust manifold is integrated into the cylinder head for compactness and improved thermal management. A three-way catalytic converter is mounted close to the turbocharger for rapid activation after cold start. The Euro 6 update introduced a particulate filter (GPF) in some markets to further reduce emissions. A secondary oxygen sensor downstream of the catalyst monitors efficiency for OBD compliance.
| Ignition and Electrical System |
Ignition is provided by a direct coil-on-plug system with iridium-tipped spark plugs gapped at 0.8–0.9 mm (0.031–0.035 inch). Each coil is individually controlled by the ECU, which manages ignition timing based on load, knock feedback, and fuel type.
The alternator output ranges from 100 to 130 amperes depending on vehicle application, and the starter motor is a 1.2-kilowatt reduction-gear type. The system operates on a 12-volt electrical supply. Spark plug replacement interval is 100,000 km (62,000 miles).
| Valve Timing and Drive Mechanism |
Both camshafts are driven by a single-row timing chain lubricated by engine oil. The chain tensioner is hydraulic, with guides ensuring low noise. Valve clearance is adjusted using shimless bucket tappets. The timing chain is designed for the life of the engine, though inspection is recommended every 150,000 km (93,000 miles). The VVT-iW mechanism allows the intake cam to retard far enough to simulate an Atkinson cycle, reducing pumping losses during cruising. On Euro 6 engines, VVT control response was improved via revised oil passages and faster control solenoids.
| Dimensions and Weight |
Overall length of the 8NR-FTS engine is approximately 610 mm (24.0 inches), width 600 mm (23.6 inches), and height 670 mm (26.4 inches). Dry weight is about 109 kg (240 lbs) for early versions and 112 kg (247 lbs) for Euro 6 updates due to added emission components. Compact dimensions allow transverse installation in front-wheel-drive vehicles. Engine mounts use hydraulic damping to isolate vibration and improve NVH characteristics.
| Maintenance Data |
Recommended engine oil and filter replacement interval is 10,000 km (6,000 miles) or annually under normal conditions, and every 5,000 km (3,000 miles) under severe driving. Air filter replacement is advised every 20,000 km (12,000 miles). Coolant renewal is every 160,000 km (100,000 miles) or five years. Spark plugs should be replaced at 100,000 km (62,000 miles). Fuel filter is integrated with the fuel pump and generally maintenance-free.
The accessory belt should be inspected every 40,000 km (25,000 miles) and replaced as necessary. The turbocharger oil lines should be inspected periodically for leakage or clogging, especially at high mileage. Recommended idle speed is 700 ± 50 rpm. Normal compression pressure is 1,400 kPa (203 psi) per cylinder, with a minimum limit of 1,100 kPa (160 psi). Maximum permissible difference between cylinders is 100 kPa (15 psi).
| Tightening Torques |
Cylinder head bolts: initial 30 Nm (22 lb-ft), plus 90 deg, plus an
additional 90 deg.
Main bearing cap bolts: 60 Nm (44 lb-ft).
Connecting rod bolts: 40 Nm (30 lb-ft) plus 90 deg.
Camshaft bearing cap bolts: 10 Nm (7 lb-ft).
Crankshaft pulley bolt: 180 Nm (133 lb-ft).
Flywheel bolts: 80 Nm (59 lb-ft) plus 90 deg.
Spark plugs: 25 Nm (18 lb-ft).
Oil drain plug: 40 Nm (30 lb-ft).
Exhaust manifold nuts: 35 Nm (26 lb-ft).
Intake manifold bolts: 25 Nm (18 lb-ft).
Engine mount bolts: 60 Nm (44 lb-ft).
| Vehicle Applications |
The 8NR-FTS engine was installed in several
Toyota and Lexus vehicles including:
– Toyota Auris (E180, E210 series)
– Toyota Corolla (E170 and E210 series, Europe and Asia)
– Toyota C-HR (ZGX10, NGX10)
– Toyota Yaris and Yaris Cross (select markets)
– Lexus CT200h turbo prototype derivatives in limited testing
– Toyota Prius+ and Avensis for specific regional variants.
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