The Land Rover Discovery V 3.0 Si6 (340 Hp) 4WD Automatic represents a significant iteration in the fifth generation of Land Rover’s popular SUV, produced primarily for the 2017 and 2018 model years. Positioned as a high-performance variant within the Discovery V lineup, it aimed to deliver a blend of luxury, off-road capability, and on-road performance. This model occupied a premium slot, sitting above the base Ingenium engine options and offering a more powerful alternative to the diesel variants available in many markets. It was designed to appeal to buyers seeking a refined and capable SUV with substantial power for towing and spirited driving.
Technical Specifications
| Brand | Land Rover |
| Model | Discovery |
| Generation | Discovery V |
| Type (Engine) | 3.0 Si6 (340 Hp) 4WD Automatic |
| Start of production | 2017 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 14.2 l/100 km (16.6 US mpg, 19.9 UK mpg, 7 km/l) |
| Fuel consumption (extra urban) | 9.3 l/100 km (25.3 US mpg, 30.4 UK mpg, 10.8 km/l) |
| Fuel consumption (combined) | 10.9 l/100 km (21.6 US mpg, 25.9 UK mpg, 9.2 km/l) |
| CO2 emissions | 254 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.1 sec |
| Acceleration 0 – 62 mph | 7.1 sec |
| Acceleration 0 – 60 mph | 6.7 sec |
| Maximum speed | 215 km/h (133.59 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 6.3 kg/Hp, 158.3 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 209.5 Nm/tonne |
| Power | 340 Hp @ 6500 rpm |
| Power per litre | 113.5 Hp/l |
| Torque | 450 Nm @ 3500-5000 rpm (331.9 lb.-ft. @ 3500-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | AJ126 |
| Engine displacement | 2995 cm3 (182.77 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 84.5 mm (3.33 in.) |
| Piston Stroke | 89 mm (3.5 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Supercharger, Intercooler |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 2148 kg (4735.53 lbs.) |
| Trunk (boot) space – minimum | 1231 l (43.47 cu. ft.) |
| Trunk (boot) space – maximum | 2500 l (88.29 cu. ft.) |
| Fuel tank capacity | 89 l (23.51 US gal | 19.58 UK gal) |
| Permitted trailer load with brakes (12%) | 3500 kg (7716.18 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4970 mm (195.67 in.) |
| Width with mirrors folded | 2073 mm (81.61 in.) |
| Width including mirrors | 2220 mm (87.4 in.) |
| Height | 1846 mm (72.68 in.) |
| Wheelbase | 2923 mm (115.08 in.) |
| Front track | 1692 mm (66.61 in.) |
| Rear (Back) track | 1686 mm (66.38 in.) |
| Front overhang | 872 mm (34.33 in.) |
| Rear overhang | 1175 mm (46.26 in.) |
| Ride height (ground clearance) | 220 mm (8.66 in.) |
| Drag coefficient (Cd) | 0.36 |
| Minimum turning circle (turning diameter) | 12.7 m (41.67 ft.) |
| Approach angle | 28.5° |
| Departure angle | 27.0° |
| Ramp-over (brakeover) angle | 22.5° |
| Climb angle | 45° |
| Wading depth | 850 mm (33.46 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission |
| Front suspension | Double wishbone, Independent coil spring |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs, 360 mm |
| Rear brakes | Ventilated discs, 350 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 235/65 R19; 255/60 R19; 255/55 R20; 275/45 R21; 285/40 R22 |
| Wheel rims size | 7.5J x 19; 8.5J x 20; 9.5J x 21; 9.5J x 22 |
INTRODUCTION
The Land Rover Discovery V 3.0 Si6 4WD Automatic, launched in 2017, represents a significant step forward in the fifth-generation Discovery series. Built on the Premium Lightweight Architecture (PLA) platform, also used for the Range Rover and Range Rover Sport, this iteration of the Discovery aimed to balance off-road prowess with on-road refinement. The 3.0 Si6 variant, powered by the supercharged AJ126 engine, was positioned as a premium offering, providing substantial power and torque for a comfortable and capable driving experience. It was a key model in Land Rover’s strategy to broaden the appeal of the Discovery, attracting buyers who desired a luxurious and versatile SUV.
Powertrain & Engine Architecture
At the heart of the Discovery V 3.0 Si6 lies the AJ126 3.0-liter supercharged V6 engine. This engine, a product of Jaguar Land Rover’s engineering expertise, utilizes a Roots-type supercharger combined with direct fuel injection to deliver a potent 340 horsepower and 450 Nm (331.9 lb-ft) of torque. The engine’s architecture features a 60-degree V-angle, contributing to its smooth operation and compact dimensions. The direct injection system optimizes fuel delivery for improved efficiency and performance. The engine is longitudinally mounted in the front of the vehicle. Paired with this engine is an eight-speed automatic transmission, providing smooth and responsive gear changes. This transmission, developed by ZF, is known for its efficiency and ability to handle the engine’s substantial torque output. The transmission features selectable driving modes, allowing the driver to tailor the vehicle’s response to different driving conditions.
Driving Characteristics
The 3.0 Si6 automatic configuration delivers a noticeably different driving experience compared to the lower-powered Ingenium engines or the diesel variants. The supercharged V6 provides strong acceleration, with a 0-60 mph time of around 6.7 seconds. The eight-speed automatic transmission contributes to this performance, offering quick and seamless gear changes. While not as fuel-efficient as the four-cylinder options, the 3.0 Si6 offers a more relaxed and effortless driving experience, particularly during highway cruising and when towing. The gear ratios are tuned for a balance of acceleration and fuel economy, with lower gears providing strong off-the-line performance and higher gears optimizing fuel efficiency at cruising speeds. The all-wheel-drive system provides excellent traction in various conditions, enhancing both on-road stability and off-road capability.
Equipment & Trim Levels
The Discovery V 3.0 Si6 typically came well-equipped, reflecting its premium positioning. Standard features included leather upholstery, a touchscreen infotainment system with navigation, climate control, and a suite of safety features such as autonomous emergency braking and lane departure warning. Higher trim levels offered additional luxuries, such as premium audio systems, panoramic sunroofs, and adaptive cruise control. Interior upholstery options included grained leather and Windsor leather, with a range of color choices available. The dashboard layout was modern and functional, with a focus on user-friendliness. Optional extras included a rear seat entertainment system, heated and cooled seats, and a configurable interior lighting system.
Chassis & Braking
The Discovery V utilizes a robust chassis designed to handle both on-road and off-road demands. The suspension system features double wishbones at the front and an independent multi-link setup at the rear, providing a comfortable ride and good handling characteristics. The 3.0 Si6 variant typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The braking system is assisted by ABS (Anti-lock Braking System) and electronic brake-force distribution. Stabilizer bars are fitted to both the front and rear axles to reduce body roll during cornering. The vehicle’s Terrain Response system allows the driver to select different driving modes optimized for various surfaces, such as grass, gravel, snow, mud, and sand.
Market Reception & Comparison
The Discovery V 3.0 Si6 was generally well-received by automotive critics, who praised its powerful engine, comfortable ride, and versatile capabilities. However, some reviewers noted that the fuel economy was relatively poor compared to the diesel and four-cylinder options. Compared to the diesel variants, the 3.0 Si6 offered a more refined and responsive driving experience, but at the cost of fuel efficiency. Against the VR6-equipped competition, the Land Rover offered a more modern interior and a more sophisticated all-wheel-drive system. The higher price point of the 3.0 Si6 also positioned it as a more premium offering, appealing to buyers willing to pay extra for performance and luxury.
Legacy
The Land Rover Discovery V 3.0 Si6 remains a desirable SUV in the used car market. The AJ126 engine, while known for its performance, requires regular maintenance to ensure reliability. Common issues include oil leaks and potential supercharger problems. However, with proper care, this engine can provide years of reliable service. The eight-speed automatic transmission is generally considered to be robust and reliable. The Discovery V’s blend of luxury, capability, and practicality continues to appeal to buyers seeking a versatile and capable SUV. Its strong build quality and advanced features ensure that it remains a competitive option in the used car market.
