The Lexus LX IV (J300) 700h, introduced for the 2025 model year, represents the latest iteration of Lexus’s flagship full-size luxury SUV. Built upon the foundation of the Toyota Land Cruiser 300 Series, the J300 LX aims to blend traditional off-road capability with cutting-edge technology and opulent comfort. This particular 700h variant distinguishes itself through its sophisticated full hybrid powertrain, delivering a combined output of 457 horsepower and 790 Nm of torque. Positioned as a premium offering within the LX lineup, the 700h caters to buyers seeking a powerful, efficient, and technologically advanced luxury SUV with seven-passenger seating.
Technical Specifications
| Brand | Lexus |
| Model | LX |
| Generation | LX IV (J300) |
| Type (Engine) | 700h V6 (457 Hp) Hybrid AWD Direct Shift 7 Seat |
| Start of production | 2025 year |
| Powertrain Architecture | FHEV (Full Hybrid Electric Vehicle) |
| Body type | SUV |
| Seats | 7 |
| Doors | 5 |
| Fuel consumption (economy) – urban (EPA) | 12.4 l/100 km (19 US mpg, 22.8 UK mpg, 8.1 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l) |
| Fuel consumption (economy) – combined (EPA) | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 60 mph | 6.4 sec |
| Maximum speed | 210 km/h (130.49 mph), Electronically limited |
| Emission standard | ULEV |
| Weight-to-power ratio | 6.1 kg/Hp, 164.4 Hp/tonne |
| Weight-to-torque ratio | 3.5 kg/Nm, 284.2 Nm/tonne |
| Battery voltage | 288 V |
| Battery technology | Nickel-metal hydride (NiMH) |
| Battery location | Under the trunk |
| Electric motor | 1 |
| Electric motor location | Between the combustion engine and the transmission |
| System power | 457 Hp @ 5200 rpm |
| System torque | 790 Nm @ 2400 rpm (582.67 lb.-ft. @ 2400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | V35A-FTS |
| Engine displacement | 3445 cm3 (210.23 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 85.5 mm (3.37 in.) |
| Piston Stroke | 100 mm (3.94 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection and Multi-port manifold injection |
| Engine aspiration | Twin-Turbo, Intercooler |
| Valvetrain | DOHC, VVT-iE |
| Engine oil capacity | 7.3 l (7.71 US qt | 6.42 UK qt) |
| Coolant | 14.7 l (15.53 US qt | 12.93 UK qt) |
| Kerb Weight | 2780-2840 kg (6128.85 – 6261.13 lbs.) |
| Max. weight | 3379 kg (7449.42 lbs.) |
| Max load | 539-599 kg (1188.29 – 1320.57 lbs.) |
| Trunk (boot) space – minimum | 205 l (7.24 cu. ft.) |
| Trunk (boot) space – maximum | 1768 l (62.44 cu. ft.) |
| Fuel tank capacity | 68 l (17.96 US gal | 14.96 UK gal) |
| Permitted trailer load with brakes (12%) | 3629 kg (8000.58 lbs.) |
| Length | 5100 mm (200.79 in.) |
| Width | 1990 mm (78.35 in.) |
| Height | 1885-1895 mm (74.21 – 74.61 in.) |
| Wheelbase | 2850 mm (112.2 in.) |
| Front track | 1677 mm (66.02 in.) |
| Rear (Back) track | 1678 mm (66.06 in.) |
| Front overhang | 1035 mm (40.75 in.) |
| Rear overhang | 1215 mm (47.83 in.) |
| Ride height (ground clearance) | 200-205 mm (7.87 – 8.07 in.) |
| Minimum turning circle (turning diameter) | 12.8 m (41.99 ft.) |
| Front suspension | Double wishbone |
| Rear suspension | Rigid axle suspension |
| Front brakes | Ventilated discs, 354×32 mm |
| Rear brakes | Ventilated discs, 335×20 mm |
| Number of gears and type of gearbox | 10 gears, automatic transmission Direct Shift |
Powertrain & Engine Architecture
At the heart of the LX 700h lies the V35A-FTS 3.4-liter twin-turbocharged V6 engine. This engine, part of Toyota’s modern engine family, utilizes both direct injection and multi-port fuel injection to optimize combustion efficiency and power delivery. The engine produces significant power on its own, but it’s integrated with a nickel-metal hydride (NiMH) battery pack and an electric motor positioned between the engine and the transmission. This configuration allows for a full hybrid experience, enabling electric-only driving at low speeds and providing supplemental power during acceleration. The electric motor contributes to the system’s combined output of 457 horsepower and 790 Nm of torque. The powertrain is paired with a 10-speed automatic transmission, specifically a “Direct Shift” unit, designed for smooth and responsive gear changes.
Driving Characteristics
The LX 700h delivers a refined and powerful driving experience. The hybrid system provides instant torque, resulting in brisk acceleration – 0 to 60 mph in approximately 6.4 seconds. While not a sports SUV, the 700h offers ample power for highway merging and overtaking. The 10-speed automatic transmission contributes to smooth gear transitions, and the hybrid system optimizes engine operation for fuel efficiency. Compared to non-hybrid LX models, the 700h offers improved fuel economy, particularly in urban driving conditions. However, the added weight of the hybrid components does slightly impact overall agility compared to lighter trims.
Equipment & Trim Levels
The LX 700h is generously equipped with standard features befitting its luxury status. These typically include premium leather upholstery, heated and ventilated front seats, a large touchscreen infotainment system with navigation, a Mark Levinson premium audio system, and a comprehensive suite of advanced driver-assistance systems (ADAS). Optional extras may include a rear-seat entertainment system, massaging seats, and a panoramic sunroof. The interior design emphasizes luxury and comfort, with high-quality materials and meticulous attention to detail.
Chassis & Braking
The LX 700h utilizes a robust chassis derived from the Land Cruiser, ensuring excellent off-road capability and durability. It features a double wishbone front suspension and a rigid axle rear suspension, providing a comfortable ride on paved roads while maintaining off-road prowess. The braking system consists of ventilated discs on all four wheels, with larger front discs (354×32 mm) compared to the rear (335×20 mm). Standard safety features include ABS (Anti-lock braking system), electronic stability control, and traction control.
Market Reception & Comparison
The LX 700h has been generally well-received by automotive critics, who praise its luxurious interior, powerful hybrid powertrain, and advanced technology. However, some reviewers note its relatively high price tag and substantial weight. Compared to other LX trims, the 700h offers superior fuel economy and a more refined driving experience, but it comes at a premium cost. Its fuel economy of around 19.9 US mpg combined is respectable for a full-size luxury SUV, but it doesn’t match the efficiency of some smaller hybrid SUVs.
Legacy
The long-term reliability of the LX 700h powertrain remains to be seen, as it is a relatively new model. However, Lexus has a strong reputation for reliability, and the underlying Toyota Land Cruiser platform is known for its durability. The hybrid system is expected to provide years of dependable service, and the robust chassis should withstand demanding use. In the used car market, the LX 700h is likely to hold its value well due to its luxurious features, powerful powertrain, and Lexus brand prestige. As hybrid technology becomes increasingly prevalent, the 700h is poised to become a desirable and sought-after luxury SUV.
