The Lincoln Navigator IV (facelift, 2021) equipped with the 3.5-liter V6 EcoBoost engine producing 440 horsepower and paired with the 10-speed SelectShift automatic transmission represents a significant evolution in Lincoln’s full-size luxury SUV offering. Introduced in August 2021 as part of a mid-cycle refresh for the fourth-generation Navigator (introduced in 2018), this variant aimed to balance powerful performance with improved refinement and technology. Production continued through the 2024 model year. This version occupied the top-tier position within the Navigator lineup, offering the highest available power output and a sophisticated driving experience.
Technical Specifications
| Brand | Lincoln |
| Model | Navigator |
| Generation | Navigator IV (facelift 2021) |
| Type (Engine) | 3.5 V6 (440 Hp) SelectShift |
| Start of production | August, 2021 |
| End of production | 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 8 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 13.8 l/100 km (17 US mpg, 20.5 UK mpg, 7.2 km/l) |
| Fuel consumption (economy) – extra urban | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg, 9.8 km/l) |
| Fuel consumption (economy) – combined | 12.4 l/100 km (19 US mpg, 22.8 UK mpg, 8.1 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 5.9 kg/Hp, 170.6 Hp/tonne |
| Weight-to-torque ratio | 3.7 kg/Nm, 267.9 Nm/tonne |
| Power | 440 Hp @ 5850 rpm |
| Power per litre | 126.1 Hp/l |
| Torque | 691 Nm @ 3000 rpm (509.66 lb.-ft. @ 3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EcoBoost |
| Engine displacement | 3490 cm3 (212.97 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 92.46 mm (3.64 in.) |
| Piston Stroke | 86.61 mm (3.41 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Twin-Turbo, Intercooler |
| Valvetrain | TIVCST |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant | 14.6 l (15.43 US qt | 12.85 UK qt) |
| Kerb Weight | 2579 kg (5685.72 lbs.) |
| Trunk (boot) space – minimum | 547 l (19.32 cu. ft.) |
| Trunk (boot) space – maximum | 2925 l (103.3 cu. ft.) |
| Fuel tank capacity | 87 l (22.98 US gal | 19.14 UK gal) |
| Permitted trailer load with brakes (12%) | 3946 kg (8699.44 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 | 1941 mm (76.42 in.) |
| Wheelbase | 3112 mm (122.52 in.) |
| Front track | 1717 mm (67.6 in.) |
| Rear (Back) track | 1707 mm (67.2 in.) |
| Front overhang | 970 mm (38.19 in.) |
| Rear overhang | 1252 mm (49.29 in.) |
| Ride height (ground clearance) | 246 mm (9.69 in.) |
| Minimum turning circle (turning diameter) | 12.2 m (40.03 ft.) |
| Approach angle | 22.3° |
| Departure angle | 22° |
| Ramp-over (brakeover) angle | 21.3° |
| 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 | 10 gears, automatic transmission SelectShift |
| Front suspension | Independent coil spring, Transverse stabilizer |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 350.52 mm |
| Rear brakes | Ventilated discs, 335.28 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 275/55 R20; 285/45 R22 |
| Wheel rims size | 20; 22 |
INTRODUCTION
The 2021 facelift of the Lincoln Navigator IV brought a host of updates, but the 3.5-liter EcoBoost V6 with 440 horsepower and the 10-speed SelectShift automatic transmission remained the flagship powertrain. This combination was designed to deliver a luxurious and powerful driving experience, catering to buyers seeking a premium full-size SUV. Built on the Ford T1 platform (shared with the Ford Expedition), the Navigator aimed to compete with rivals like the Cadillac Escalade and the Jeep Grand Wagoneer. The facelift included revised styling, enhanced technology features, and a focus on improving the overall refinement of the vehicle.
Powertrain & Engine Architecture
At the heart of this Navigator variant lies Ford’s 3.5-liter EcoBoost V6 engine. This engine, designated as the third generation of the EcoBoost family, utilizes a twin-turbocharger setup with intercooling to deliver substantial power and torque. The engine employs direct fuel injection and a variable valve timing system (TIVCST – Twin Independent Variable Camshaft Timing with Stroke Technology) to optimize efficiency and performance. The 10-speed SelectShift automatic transmission, co-developed with General Motors, provides a wide range of gear ratios for smooth acceleration and efficient cruising. This transmission allows for precise control and contributes to the Navigator’s towing capacity. The engine code is generally associated with the broader EcoBoost family, but specific calibrations and tuning differentiate it for the Navigator application.
Driving Characteristics
The 440 horsepower and 691 lb-ft of torque delivered by this powertrain configuration translate into strong acceleration and effortless highway cruising. The 10-speed transmission is well-tuned, providing quick and seamless shifts. While not overtly sporty, the Navigator offers a composed and confident driving experience. Compared to lower-output engine options (none were offered post-facelift), this variant provides significantly more power for towing, hauling passengers, and navigating challenging terrain. The rear-wheel-drive configuration contributes to a balanced feel, although four-wheel drive was a popular option. The gear ratios are optimized for both low-end torque and high-speed stability.
Equipment & Trim Levels
The 440-hp Navigator typically came standard with a high level of equipment, reflecting its position as the top-tier trim. Standard features included leather upholstery, heated and ventilated front seats, a premium sound system (often Revel), a large touchscreen infotainment system with navigation, and a suite of advanced driver-assistance systems (ADAS) such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras included massaging front seats, a rear-seat entertainment system, and upgraded interior trim materials. The Navigator Reserve and Navigator Black Label trims were commonly equipped with this powertrain, offering progressively more luxurious features and customization options.
Chassis & Braking
The Navigator IV utilizes an independent rear suspension, a significant upgrade over previous generations, contributing to a more comfortable ride. The front suspension features independent coil springs and a transverse stabilizer bar. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power for a vehicle of this size and weight. The anti-lock braking system (ABS) is standard, along with electronic stability control. The chassis is designed to provide a balance between ride comfort and handling stability, prioritizing a smooth and refined driving experience.
Market Reception & Comparison
The 2021 Navigator facelift, particularly with the 440-hp EcoBoost engine, was generally well-received by automotive critics. Reviewers praised its powerful engine, comfortable ride, spacious interior, and advanced technology features. Fuel economy, as expected for a full-size luxury SUV, was a point of concern, averaging around 19 mpg combined. Compared to the Cadillac Escalade, the Navigator was often lauded for its more comfortable ride and user-friendly infotainment system. However, the Escalade offered a more visually striking design and a more powerful engine option (with the supercharged V8). Reliability reports have been generally positive, with the EcoBoost engine proving to be relatively durable when properly maintained.
Legacy
The Lincoln Navigator IV (2021-2024) with the 3.5-liter EcoBoost V6 and 10-speed automatic transmission represents a high point in Lincoln’s SUV offerings. The powertrain has proven to be reliable, and the Navigator remains a popular choice in the used car market. Its combination of power, luxury, and technology continues to appeal to buyers seeking a premium full-size SUV. While newer models have emerged, this generation Navigator holds its own as a capable and refined vehicle, offering a compelling alternative to its competitors.
