The Lincoln Navigator II, specifically the 5.4i V8 24V (300 Hp) Automatic variant, represented a significant iteration of Lincoln’s full-size luxury SUV. Produced from 2005 to 2006, this model year fell within the second generation (2003-2006) of the Navigator, which was based on the Ford U246 platform shared with the Ford Expedition. Positioned as a premium offering within the Navigator lineup, the 5.4i V8 Automatic catered to buyers seeking a powerful and comfortable SUV with substantial towing capacity. It served as the mainstay engine option during these years, offering a balance between performance and refinement compared to potential future engine configurations.
Technical Specifications
| Brand | Lincoln |
| Model | Navigator |
| Generation | Navigator II |
| Type (Engine) | 5.4i V8 24V (300 Hp) Automatic |
| Start of production | 2005 |
| End of production | 2006 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 8 |
| Doors | 5 |
| Fuel consumption (urban) | 19.6 l/100 km (12 US mpg, 14.4 UK mpg, 5.1 km/l) |
| Fuel consumption (extra urban) | 13.9 l/100 km (16.9 US mpg, 20.3 UK mpg, 7.2 km/l) |
| Fuel consumption (combined) | 16.8 l/100 km (14 US mpg, 16.8 UK mpg, 6 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.4 kg/Hp, 119 Hp/tonne |
| Weight-to-torque ratio | 5.1 kg/Nm, 196.4 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) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | Triton / T54USEM |
| 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 | 105.8 mm (4.17 in.) |
| Compression ratio | 9.5:1 |
| Number of valves per cylinder | 3 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant | 18.4 l (19.44 US qt | 16.19 UK qt) |
| Kerb Weight | 2520 kg (5555.65 lbs.) |
| Max. weight | 3277 kg (7224.55 lbs.) |
| Max load | 757 kg (1668.9 lbs.) |
| Trunk (boot) space – minimum | 518 l (18.29 cu. ft.) |
| Trunk (boot) space – maximum | 2968 l (104.81 cu. ft.) |
| Fuel tank capacity | 106 l (28 US gal | 23.32 UK gal) |
| Length | 5232 mm (205.98 in.) |
| Width | 2000 mm (78.74 in.) |
| Width with mirrors folded | 2029 mm (79.88 in.) |
| Width including mirrors | 2088 mm (82.2 in.) |
| Height | 1975 mm (77.76 in.) |
| Wheelbase | 3018 mm (118.82 in.) |
| Front track | 1701 mm (66.97 in.) |
| Rear (Back) track | 1704 mm (67.09 in.) |
| Ride height (ground clearance) | 241 mm (9.49 in.) |
| Drag coefficient (Cd) | 0.41 |
| Minimum turning circle | 11.8 m (38.71 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 6 |
| Gearbox type | Automatic transmission |
| Front suspension | Air suspension |
| Rear suspension | Air suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 255/70 R18 |
| Wheel rims size | 18 |
Powertrain & Engine Architecture
The heart of the Navigator II 5.4i was the Ford Triton 5.4-liter V8 engine, specifically designated as the T54USEM. This engine was a three-valve-per-cylinder design, a significant upgrade from the earlier two-valve versions. The Triton engine utilized a 9.5:1 compression ratio and multi-port fuel injection to deliver 300 horsepower at 5000 rpm and 495 Nm (365 lb-ft) of torque at 3750 rpm. The engine’s longitudinal mounting and rear-wheel-drive configuration were standard for body-on-frame SUVs of this era. Paired with the engine was a six-speed automatic transmission, providing smooth shifts and optimized gear ratios for both towing and everyday driving. This transmission was crucial for managing the engine’s power and torque effectively, especially considering the Navigator’s substantial weight.
Driving Characteristics
The 5.4-liter V8 and six-speed automatic combination provided a respectable driving experience for a full-size SUV. While not overtly sporty, the Navigator II offered ample power for merging onto highways and passing maneuvers. The automatic transmission was tuned for comfort, with relatively smooth gear changes. Compared to the base 4.6-liter V8 option (if offered in some markets), the 5.4i delivered noticeably stronger acceleration and a more confident feel when towing. However, it wasn’t as nimble or fuel-efficient as smaller SUVs or those with more modern engine technologies. The air suspension contributed to a comfortable ride, absorbing bumps and providing a stable platform, but it also added complexity to the vehicle’s maintenance.
Equipment & Trim Levels
The Navigator II 5.4i Automatic typically came well-equipped, reflecting its luxury positioning. Standard features included leather upholstery, power-adjustable front seats, a premium audio system, tri-zone automatic climate control, and alloy wheels. Optional extras included a DVD entertainment system, power-folding running boards, a sunroof, and advanced safety features like parking sensors and a navigation system. Trim levels varied, but the 5.4i generally represented a step up from base models, offering more standard features and the availability of more luxurious options.
Chassis & Braking
The Navigator II utilized a traditional body-on-frame construction, providing robust durability and towing capacity. The chassis featured an independent front suspension with air suspension, and a solid rear axle also equipped with air suspension. This air suspension system allowed for adjustable ride height and automatic load leveling. Braking duties were handled by ventilated disc brakes on all four wheels, coupled with an Anti-lock Braking System (ABS) for enhanced safety. The Navigator’s substantial weight necessitated a robust braking system to ensure adequate stopping power.
Market Reception & Comparison
The Lincoln Navigator II 5.4i V8 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, typical for a large SUV of its time. Compared to competitors like the Cadillac Escalade and GMC Yukon Denali, the Navigator offered a similar level of luxury and capability, often at a slightly more competitive price point. The 5.4i engine offered a good balance between power and refinement, making it a popular choice for buyers who prioritized towing capacity and a comfortable driving experience.
Legacy
The 5.4-liter Triton V8 engine, while generally reliable, is known for potential issues with spark plug breakage and timing chain wear, particularly in higher-mileage examples. The air suspension system can also require maintenance and repairs over time. Today, the Navigator II 5.4i Automatic represents an affordable entry point into the full-size luxury SUV segment. Well-maintained examples are sought after by enthusiasts who appreciate their classic styling, spacious interiors, and powerful V8 engines. While fuel economy remains a concern, the Navigator II continues to offer a compelling combination of comfort, capability, and value in the used car market.
