The Lincoln Navigator III L 5.4i, produced from 2008 to 2014, represented the third generation of Lincoln’s full-size luxury SUV. Positioned as the flagship model for the brand, the Navigator competed directly with the Cadillac Escalade, Chevrolet Suburban, and GMC Yukon. The “L” designation indicated the extended wheelbase version, offering increased passenger and cargo space. This particular variant, equipped with the 5.4-liter Triton V8 engine and a six-speed automatic transmission, was a mainstay of the Navigator lineup, balancing power with a degree of refinement expected from a luxury vehicle. It served as a popular choice for families and those needing substantial towing capacity.
Technical Specifications
| Brand | Lincoln |
| Model | Navigator |
| Generation | Navigator III L |
| Type (Engine) | 5.4i V8 (310 Hp) Automatic |
| Start of production | 2008 year |
| End of production | 2014 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 8 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 16.8 l/100 km (14 US mpg, 16.8 UK mpg, 6 km/l) |
| Fuel consumption (economy) – extra urban | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 km/l) |
| Fuel consumption (economy) – combined | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.8 kg/Hp, 113.1 Hp/tonne |
| Weight-to-torque ratio | 5.5 kg/Nm, 180.6 Nm/tonne |
| Power | 310 Hp @ 5000 rpm |
| Power per litre | 57.3 Hp/l |
| Torque | 495 Nm @ 3600 rpm (365.09 lb.-ft. @ 3600 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 | 15.5 l (16.38 US qt | 13.64 UK qt) |
| Kerb Weight | 2741 kg (6042.87 lbs.) |
| Max. weight | 3493 kg (7700.75 lbs.) |
| Max load | 752 kg (1657.88 lbs.) |
| Trunk (boot) space – minimum | 1209 l (42.7 cu. ft.) |
| Trunk (boot) space – maximum | 3630 l (128.19 cu. ft.) |
| Fuel tank capacity | 127 l (33.55 US gal | 27.94 UK gal) |
| Length | 5672 mm (223.31 in.) |
| Width | 2002 mm (78.82 in.) |
| Width including mirrors | 2332 mm (91.81 in.) |
| Height | 1984 mm (78.11 in.) |
| Wheelbase | 3327 mm (130.98 in.) |
| Front track | 1699 mm (66.89 in.) |
| Rear (Back) track | 1702 mm (67.01 in.) |
| Ride height (ground clearance) | 231 mm (9.09 in.) |
| Drag coefficient (Cd) | 0.40 |
| Minimum turning circle (turning diameter) | 13.39 m (43.93 ft.) |
| Approach angle | 22.2° |
| Departure angle | 20.5° |
| Ramp-over (brakeover) angle | 18.4° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, 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
The heart of this Navigator variant was the 5.4-liter Triton V8 engine. This engine, a staple of Ford’s truck and SUV lineup for many years, featured a cast-iron block with aluminum cylinder heads. The engine utilized a single overhead camshaft (SOHC) design per bank, incorporating variable valve timing (VVT) to optimize performance and fuel efficiency. Fuel delivery was handled by a multi-port fuel injection system. The 5.4L Triton produced 310 horsepower at 5000 rpm and 495 lb-ft of torque at 3600 rpm. This power was channeled through a six-speed automatic transmission, a significant upgrade from the four-speed units found in earlier Navigators. The transmission was designed to provide smooth shifts and efficient power delivery, although it wasn’t known for being particularly sporty.
Driving Characteristics
The 5.4-liter V8 and six-speed automatic provided adequate, though not exhilarating, performance. Acceleration from 0 to 60 mph typically took around 7.5-8.5 seconds. The automatic transmission prioritized comfort and smoothness over aggressive shifting. Compared to the Navigator models equipped with the optional 3.5L EcoBoost V6 (introduced in later years), the 5.4L felt less responsive. The gear ratios were tuned for towing and cruising, making it a capable hauler but less engaging for spirited driving. The rear-wheel-drive configuration contributed to a more traditional truck-like feel, and while four-wheel drive was available, this variant was often purchased by those who didn’t require it.
Equipment & Trim Levels
The Navigator III L 5.4i typically came standard with a generous array of features, befitting its luxury SUV status. These included leather upholstery, tri-zone automatic climate control, a premium audio system (often a THX II certified system), power-adjustable front seats with memory function, and a rear entertainment system with a DVD player. Optional extras included power-deployable running boards, a navigation system, and upgraded leather trim. The “L” designation meant extended length, providing more third-row legroom and cargo capacity. Trim levels varied, but generally offered increasing levels of luxury and technology.
Chassis & Braking
The Navigator III L utilized a body-on-frame construction, providing a robust and durable platform. The suspension consisted of independent coil springs at both the front and rear, offering a comfortable ride. Braking duties were handled by ventilated discs at all four corners, coupled with an anti-lock braking system (ABS). The Navigator’s substantial weight (around 6,000 lbs) meant that braking performance was adequate but not exceptional. The rear suspension was tuned to handle heavy loads, making it suitable for towing.
Market Reception & Comparison
The Navigator III L 5.4i was generally well-received by critics, who praised its spacious interior, comfortable ride, and powerful engine. However, its fuel economy was a common criticism, averaging around 16 mpg combined. Compared to the EcoBoost-equipped Navigators, the 5.4L version offered a lower price point but sacrificed some performance and fuel efficiency. The 5.4L engine was known for its reliability, but required regular maintenance, including spark plug replacement, to prevent issues. It was often seen as a more traditional, less technologically advanced option compared to its competitors.
Legacy
The 5.4-liter Triton V8, while eventually superseded by more modern engines, proved to be a durable and reliable powerplant. Today, used Navigator III L models with the 5.4L engine are relatively affordable and can be found in good condition with reasonable mileage. However, potential buyers should be aware of the engine’s potential for spark plug issues and the importance of regular maintenance. The Navigator III L 5.4i represents a significant chapter in Lincoln’s history, offering a blend of luxury, space, and capability that appealed to a wide range of buyers.
