The Lincoln Navigator IV, specifically the 3.5 V6 (456 Hp) 4WD Automatic variant, represents a significant evolution in Lincoln’s full-size luxury SUV offerings. Produced from November 2017 through August 2021, this fourth generation Navigator (designated as the 4th generation) aimed to recapture market share in a segment increasingly dominated by domestic rivals like Cadillac and GMC, as well as import brands like Mercedes-Benz and BMW. Positioned as a premium trim within the Navigator lineup, the 3.5L EcoBoost V6 with four-wheel drive and a ten-speed automatic transmission offered a balance of powerful performance, sophisticated technology, and spacious luxury. It served as a core model, sitting above the base trims and below the even more opulent Reserve and Black Label models.
Technical Specifications
| Brand | Lincoln |
| Model | Navigator |
| Generation | Navigator IV |
| Type (Engine) | 3.5 V6 (456 Hp) 4WD Automatic |
| Start of production | November, 2017 |
| End of production | August, 2021 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 8 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel consumption (economy) – extra urban | 11.2 l/100 km (21 US mpg, 25.2 UK mpg, 8.9 km/l) |
| Fuel consumption (economy) – combined | 13.1 l/100 km (18 US mpg, 21.6 UK mpg, 7.6 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 5.8 kg/Hp, 171.7 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 260.2 Nm/tonne |
| Power | 456 Hp @ 5500 rpm |
| Power per litre | 130.4 Hp/l |
| Torque | 691 Nm @ 3000 rpm (509.66 lb.-ft. @ 3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EcoBoost |
| Engine displacement | 3496 cm3 (213.34 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 92.5 mm (3.64 in.) |
| Piston Stroke | 86.7 mm (3.41 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-Turbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant | 17 l (17.96 US qt | 14.96 UK qt) |
| Kerb Weight | 2656 kg (5855.48 lbs.) |
| Trunk (boot) space – minimum | 547 l (19.32 cu. ft.) |
| Trunk (boot) space – maximum | 2925 l (103.3 cu. ft.) |
| Fuel tank capacity | 88 l (23.25 US gal | 19.36 UK gal) |
| Permitted trailer load with brakes (12%) | 3765 kg (8300.4 lbs.) |
| Length | 5334 mm (210 in.) |
| Width | 2029 mm (79.88 in.) |
| Width with mirrors folded | 2123 mm (83.58 in.) |
| Width including mirrors | 2383 mm (93.82 in.) |
| Height | 1938 mm (76.3 in.) |
| Wheelbase | 3112 mm (122.52 in.) |
| Front track | 1717 mm (67.6 in.) |
| Rear (Back) track | 1707 mm (67.2 in.) |
| Ride height (ground clearance) | 244 mm (9.61 in.) |
| Drag coefficient (Cd) | 0.35 |
| Approach angle | 22.2° |
| Departure angle | 21.9° |
| Ramp-over (brakeover) angle | 21.1° |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 10 gears, automatic transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 285/45 R22 |
| Wheel rims size | 22 |
INTRODUCTION
The fourth-generation Lincoln Navigator, launched for the 2018 model year, marked a significant departure from its predecessors. Built on a modified version of the Ford F-150’s fully independent rear suspension, it prioritized ride comfort and interior space. The 3.5-liter EcoBoost V6 engine, paired with a sophisticated ten-speed automatic transmission and available four-wheel drive, became the sole powertrain option, replacing the older V8 engines. This specific 4WD Automatic configuration was a popular choice, offering a blend of capability and refinement for buyers seeking a luxurious and capable full-size SUV. The Navigator IV aimed to compete directly with established luxury SUV players, emphasizing a more modern and upscale experience.
Powertrain & Engine Architecture
At the heart of the Navigator IV 3.5L 4WD Automatic lies Ford’s 3.5-liter EcoBoost V6 engine. This engine, designated within Ford as part of the EcoBoost family, utilizes direct fuel injection, a twin-turbocharger setup, and an intercooler to deliver substantial power and torque. The engine code is generally associated with the broader EcoBoost family, but specific calibrations and components were tailored for the Navigator. The twin-turbochargers, utilizing a single-scroll design, minimize turbo lag and provide a broad torque curve. The ten-speed automatic transmission, co-developed with General Motors, is a crucial component of this powertrain. Its closely spaced gear ratios optimize engine performance and fuel efficiency. The transmission features a wide 7.3:1 overall gear ratio, contributing to both strong acceleration and relaxed highway cruising. The 4WD system is an automatic, on-demand system that seamlessly engages all four wheels when traction is needed.
Driving Characteristics
The 456 horsepower and 691 lb-ft of torque produced by the 3.5L EcoBoost V6 translate into strong acceleration and effortless towing capability. While not a sports SUV, the Navigator IV 3.5L 4WD Automatic offers a surprisingly responsive driving experience for its size. The ten-speed transmission is generally smooth and quick-shifting, although some drivers have noted occasional hunting for the right gear in certain situations. Compared to potential V8 alternatives (had they been offered), the EcoBoost V6 provides a more refined and quieter driving experience. The independent rear suspension contributes to a comfortable ride, even on rough roads. The 4WD system provides confident traction in inclement weather and on slippery surfaces. The gear ratios are tuned for both quick off-the-line acceleration and relaxed cruising at highway speeds.
Equipment & Trim Levels
The Navigator IV 3.5L 4WD Automatic came standard with a generous array of features, including leather upholstery, tri-zone automatic climate control, a power liftgate, and a suite of advanced safety technologies like blind-spot monitoring and lane-keeping assist. The infotainment system featured a large touchscreen display with navigation and smartphone integration (Apple CarPlay and Android Auto). Optional extras included adaptive cruise control, a panoramic sunroof, and premium audio systems. Interior trim levels varied, with higher trims offering more luxurious materials and finishes. The standard seating configuration was eight passengers, with available second-row captain’s chairs reducing capacity to seven.
Chassis & Braking
The Navigator IV’s chassis is based on a modified version of the Ford F-150’s frame, providing a robust and durable foundation. The fully independent rear suspension, a significant upgrade over previous generations, contributes to a smoother and more controlled ride. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. Anti-lock brakes (ABS) and electronic stability control are standard features. The steering system utilizes an electric power-assist system, offering precise and responsive steering feel. The Navigator IV’s relatively high curb weight (around 5855 lbs) necessitates a robust suspension and braking system to maintain control and stability.
Market Reception & Comparison
The fourth-generation Lincoln Navigator was generally well-received by critics, who praised its luxurious interior, comfortable ride, and powerful engine. The 3.5L EcoBoost V6 and ten-speed automatic transmission were lauded for their performance and refinement. Fuel economy, however, was a common criticism, with the Navigator IV achieving around 18 mpg in combined driving. Compared to other trims in the Navigator lineup, the 3.5L 4WD Automatic offered a compelling balance of performance and value. It was more affordable than the higher-end Reserve and Black Label models, while still providing a luxurious and capable driving experience. It was often compared to the Cadillac Escalade and GMC Yukon Denali, with the Navigator IV generally considered to offer a more modern and refined interior.
Legacy
The Lincoln Navigator IV 3.5L 4WD Automatic has proven to be a relatively reliable powertrain, with few widespread mechanical issues reported. The EcoBoost engine, while complex, has generally demonstrated good durability. The ten-speed automatic transmission has also proven to be robust, although some owners have reported minor issues with software glitches. On the used car market, the Navigator IV 3.5L 4WD Automatic holds its value reasonably well, reflecting its reputation for luxury, capability, and reliability. It remains a popular choice for buyers seeking a spacious and well-equipped full-size luxury SUV.
