The Haval Big Dog II 1.5T 9.4 kWh (326 Hp) Plug-in Hybrid DHT, launched in 2023, represents Haval’s entry into the increasingly competitive plug-in hybrid crossover utility vehicle (CUV) segment. Positioned as a technologically advanced and fuel-efficient option within the Big Dog II lineup, this variant combines a 1.5-liter turbocharged gasoline engine with an electric motor and a 9.4 kWh battery pack. It’s designed to appeal to consumers seeking reduced emissions and improved fuel economy without sacrificing the practicality and space of a CUV. The Big Dog II is primarily marketed within the Chinese automotive market, where demand for both SUVs and new energy vehicles is exceptionally high.
Technical Specifications
| Brand | Haval |
| Model | Big Dog |
| Generation | Big Dog II |
| Type (Engine) | 1.5T 9.4 kWh (326 Hp) Plug-in Hybrid DHT |
| Start of production | 2023 |
| Powertrain Architecture | PHEV (Plug-in Hybrid Electric Vehicle) |
| Body type | CUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (combined WLTC) | 3.1 l/100 km (75.9 US mpg, 91.1 UK mpg, 32.3 km/l) |
| Fuel Type | Petrol / electricity |
| Emission standard | China VI |
| Gross battery capacity | 9.4 kWh |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Below the floor |
| All-electric range (WLTC) | 43 km (26.72 mi) |
| Electric motor power | 177 Hp |
| Electric motor Torque | 300 Nm (221.27 lb.-ft.) |
| Electric motor location | Integrated into the transmission |
| System power | 326 Hp |
| System torque | 530 Nm (390.91 lb.-ft.) |
| Internal combustion engine power | 154 Hp |
| Power per litre | 102.7 Hp/l |
| Engine torque | 233 Nm (171.85 lb.-ft.) |
| Engine layout | Front, Transverse |
| Engine Model/Code | GW4B15D |
| Engine displacement | 1499 cm3 (91.47 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | VGT |
| Engine oil capacity | 4 l (4.23 US qt | 3.52 UK qt) |
| Coolant capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Engine systems | Start & Stop System |
| Length | 4705 mm (185.24 in.) |
| Width | 1908 mm (75.12 in.) |
| Height | 1780 mm (70.08 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Ride height (ground clearance) | 200 mm (7.87 in.) |
| Drivetrain Architecture | Front wheel drive, PHEV. ICE and electric motor drive front wheels. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 2 gears, automatic transmission DHT |
| Front suspension | Independent type McPherson |
| Rear suspension | Independent multi-link suspension |
| 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 | 235/60 R19 |
| Wheel rims size | 19 |
Powertrain & Engine Architecture
The Haval Big Dog II 1.5T PHEV utilizes a sophisticated plug-in hybrid system. The core of the powertrain is the GW4B15D, a 1.5-liter inline-four cylinder turbocharged gasoline engine. This engine employs direct fuel injection and a variable geometry turbocharger (VGT) to optimize both power and efficiency. It produces 154 horsepower and 233 Nm (171.85 lb.-ft.) of torque. Coupled with this is a 177 horsepower electric motor integrated directly into the Dedicated Hybrid Transmission (DHT). The DHT is a two-speed automatic transmission designed specifically for hybrid applications, allowing for seamless transitions between electric, gasoline, and combined power modes. The 9.4 kWh lithium-ion battery pack is positioned under the vehicle floor, minimizing impact on passenger space. The system prioritizes electric power for shorter trips and low-speed driving, switching to gasoline or a combination of both for higher speeds or increased power demands.
Driving Characteristics
The 1.5T PHEV variant of the Big Dog II offers a noticeably different driving experience compared to its solely gasoline-powered siblings. In pure electric mode, the vehicle provides near-silent operation and instant torque, resulting in brisk acceleration around town. The DHT transmission contributes to smooth and efficient power delivery. When the gasoline engine engages, the transition is generally seamless, though some drivers may detect a slight change in engine note. The combined system output of 326 horsepower and 530 Nm (390.91 lb.-ft.) of torque provides ample power for highway merging and overtaking. While not a performance-oriented vehicle, the Big Dog II 1.5T PHEV delivers a responsive and comfortable driving experience. The two-speed DHT, while efficient, doesn’t offer the multiple gear ratios found in traditional automatic transmissions, which can sometimes be noticeable during hard acceleration.
Equipment & Trim Levels
The Big Dog II 1.5T 9.4 kWh typically comes well-equipped, reflecting its position as a relatively high-end trim level. Standard features generally include a large touchscreen infotainment system with smartphone integration, a digital instrument cluster, leather upholstery, automatic climate control, and a suite of advanced driver-assistance systems (ADAS) such as adaptive cruise control, lane keeping assist, and automatic emergency braking. Optional extras often include a panoramic sunroof, premium audio system, and ventilated front seats. Interior trim levels vary, with higher trims offering more luxurious materials and finishes.
Chassis & Braking
The Big Dog II utilizes a front-wheel-drive layout. The suspension system consists of independent McPherson struts at the front and an independent multi-link setup at the rear, providing a comfortable ride and decent handling characteristics. Ventilated disc brakes are used on all four wheels, providing adequate stopping power. The vehicle is equipped with an anti-lock braking system (ABS) and electronic stability control (ESC) as standard safety features. The ride height of 200mm (7.87 inches) provides reasonable ground clearance for navigating varied road conditions.
Market Reception & Comparison
The Haval Big Dog II 1.5T PHEV has been generally well-received in the Chinese market, where consumers are increasingly embracing plug-in hybrid technology. Critics have praised its fuel efficiency, comfortable ride, and spacious interior. Compared to the standard gasoline-powered Big Dog II models, the PHEV variant offers significantly improved fuel economy and reduced emissions. Compared to other plug-in hybrid CUVs in the Chinese market, the Big Dog II 1.5T PHEV offers a competitive combination of price, features, and performance. Some reviews have noted that the interior materials, while generally good, don’t quite match the quality found in some European or Japanese competitors.
Legacy
As a relatively new model, the long-term reliability of the Haval Big Dog II 1.5T PHEV powertrain remains to be fully established. However, Haval has been steadily improving its build quality and reliability in recent years. The DHT transmission, while complex, is a key component of Haval’s hybrid strategy and is expected to be refined and improved in future iterations. On the used car market, the Big Dog II 1.5T PHEV is likely to hold its value reasonably well, particularly as demand for plug-in hybrid vehicles continues to grow. The success of this variant will play a crucial role in Haval’s broader ambitions to become a leading player in the global new energy vehicle market.
