The Lincoln Navigator III, specifically the 5.4i V8 (300 Hp) Automatic variant, represents a significant iteration in Lincoln’s full-size luxury SUV lineage. Produced from 2006 to 2008, this generation Navigator (internally designated as the 5L) built upon the success of its predecessors, offering a blend of American luxury, substantial size, and capable performance. This particular trim level, powered by the Triton V8 and a six-speed automatic transmission, occupied a central position within the Navigator III lineup, offering a balance between power, refinement, and price point. It sat above the base models and below the more opulent, fully-loaded trims.
Technical Specifications
| Brand | Lincoln |
| Model | Navigator |
| Generation | Navigator III |
| Type (Engine) | 5.4i V8 (300 Hp) Automatic |
| Start of production | 2006 |
| End of production | 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 8 |
| Doors | 5 |
| Fuel consumption (urban) | 18.1 l/100 km (13 US mpg, 15.6 UK mpg, 5.5 km/l) |
| Fuel consumption (extra urban) | 13.1 l/100 km (18 US mpg, 21.6 UK mpg, 7.6 km/l) |
| Fuel consumption (combined) | 15.7 l/100 km (15 US mpg, 18 UK mpg, 6.4 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.3 sec |
| Acceleration 0 – 62 mph | 9.3 sec |
| Acceleration 0 – 60 mph | 8.8 sec |
| Maximum speed | 190 km/h (118.06 mph) |
| Weight-to-power ratio | 8.9 kg/Hp, 112.6 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 185.7 Nm/tonne |
| Power | 300 Hp @ 5000 rpm |
| Power per litre | 55.5 Hp/l |
| Torque | 495 Nm @ 3750 rpm (365.09 lb.-ft. @ 3750 rpm) |
| Maximum engine speed | 5400 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | Triton |
| Engine displacement | 5408 cm3 (330.02 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 90.2 mm (3.55 in.) |
| Piston Stroke | 105.9 mm (4.17 in.) |
| Compression ratio | 9.8:1 |
| Number of valves per cylinder | 3 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC, VVT |
| Engine oil capacity | 6.6 l (6.97 US qt | 5.81 UK qt) |
| Coolant | 19.5 l (20.61 US qt | 17.16 UK qt) |
| Kerb Weight | 2665 kg (5875.32 lbs.) |
| Max. weight | 3402 kg (7500.13 lbs.) |
| Max load | 737 kg (1624.81 lbs.) |
| Trunk (boot) space – minimum | 515 l (18.19 cu. ft.) |
| Trunk (boot) space – maximum | 2931 l (103.51 cu. ft.) |
| Fuel tank capacity | 106 l (28 US gal | 23.32 UK gal) |
| Length | 5293 mm (208.39 in.) |
| Width | 2002 mm (78.82 in.) |
| Width including mirrors | 2332 mm (91.81 in.) |
| Height | 1989 mm (78.31 in.) |
| Wheelbase | 3023 mm (119.02 in.) |
| Front track | 1699 mm (66.89 in.) |
| Rear (Back) track | 1702 mm (67.01 in.) |
| Ride height (ground clearance) | 228 mm (8.98 in.) |
| Drag coefficient (Cd) | 0.40 |
| Minimum turning circle | 12.45 m (40.85 ft.) |
| Approach angle | 22.4° |
| Departure angle | 21.7° |
| Ramp-over angle | 19.2° |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 6 |
| Gearbox type | Automatic transmission |
| Front suspension | Independent coil spring |
| Rear suspension | Independent coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 255/70 R18 |
| Wheel rims size | 18 |
Powertrain & Engine Architecture
At the heart of the Navigator III 5.4i lies Ford’s 5.4-liter Triton V8 engine. This engine, part of the modular engine family, featured a cast-iron block with aluminum cylinder heads. The 5.4L Triton utilized a single overhead camshaft (SOHC) design per bank, incorporating variable valve timing (VVT) to optimize performance and fuel efficiency across the rev range. Fuel delivery was managed by a multi-port fuel injection system. The engine produced 300 horsepower at 5000 rpm and 495 lb-ft of torque at 3750 rpm. This power was channeled through a six-speed automatic transmission, a significant upgrade from the four-speed units found in earlier Navigators. The six-speed transmission offered smoother shifts and improved fuel economy. The transmission was designed to handle the substantial torque output of the Triton V8, providing confident acceleration and towing capability.
Driving Characteristics
The 5.4L V8 and six-speed automatic combination delivered a driving experience that prioritized comfort and capability over outright sportiness. Acceleration from 0-60 mph took approximately 8.8 seconds, respectable for a full-size SUV of this era. The automatic transmission was tuned for smooth, almost imperceptible shifts during normal driving. However, when pushed, it could downshift quickly to provide adequate power for passing maneuvers. Compared to the Navigator’s available 4.6L V8, the 5.4L offered a noticeable increase in both horsepower and torque, resulting in more effortless acceleration and improved towing capacity. While not as fuel-efficient as the smaller engine, the 5.4L provided a more satisfying driving experience for those who frequently hauled passengers or cargo. The rear-wheel-drive configuration contributed to a more traditional SUV feel, although four-wheel drive was available as an option.
Equipment & Trim Levels
The Navigator III 5.4i Automatic typically came standard with features such as leather upholstery, tri-zone automatic climate control, a premium audio system, power-adjustable front seats, and a rear entertainment system. Exterior features included alloy wheels, chrome accents, and power-folding mirrors. Optional extras included a navigation system, power-deployable running boards, and upgraded leather trim. The interior design emphasized luxury and spaciousness, with ample room for passengers and cargo. The third-row seats were relatively comfortable, making the Navigator a viable option for families.
Chassis & Braking
The Navigator III utilized a body-on-frame construction, providing a robust and durable platform. The suspension consisted of independent coil springs at all four corners, offering a comfortable ride quality. The rear brakes were ventilated discs, an upgrade over the drums found on some earlier models. Anti-lock brakes (ABS) were standard, enhancing safety and control during emergency braking situations. The steering system employed a rack-and-pinion setup, providing precise and responsive handling. The Navigator’s substantial weight (approximately 5875 lbs) necessitated a capable braking system and a robust suspension to maintain stability and control.
Market Reception & Comparison
The Lincoln Navigator III 5.4i Automatic was generally well-received by critics and consumers alike. It was praised for its spacious interior, comfortable ride, and powerful engine. However, its fuel economy was a common criticism, as expected for a vehicle of its size and weight. Compared to competitors such as the Cadillac Escalade and the Chevrolet Suburban, the Navigator offered a unique blend of luxury and capability. The Escalade often appealed to buyers seeking a more stylish and sporty SUV, while the Suburban prioritized maximum cargo space and towing capacity. The Navigator positioned itself as a refined and comfortable option for families and those who valued a premium driving experience.
Legacy
The 5.4L Triton V8, while generally reliable, is known to have some potential issues, including spark plug breakage and timing chain wear. Regular maintenance, including oil changes and spark plug replacement, is crucial to ensure the longevity of this engine. Today, the Navigator III 5.4i Automatic can be found on the used car market at relatively affordable prices. It remains a popular choice for those seeking a large, comfortable, and capable SUV. Its spacious interior, powerful engine, and available features make it a compelling option for families and those who need a vehicle that can handle a variety of tasks. While fuel economy is not its strong suit, the Navigator III 5.4i continues to offer a compelling value proposition in the full-size luxury SUV segment.
