Alfa Romeo Q4: A 75-Year Legacy of All-Wheel Drive Technology

• The 1900 M off-road vehicle, introduced in 1951, laid the foundation for Alfa Romeo’s 4×4 tradition.

• Today, all-wheel drive provides a safe and sporty driving experience across the entire Alfa Romeo range.

• Alfa^TM Q4 technology guarantees optimal traction in the high-performance versions of the Alfa Romeo Junior, Tonale, Giulia, and Stelvio models.

• Depending on the model, the Q4 system operates mechanically or in a combination of internal combustion and electric motors.

• Accounting for 26 percent of global sales in 2025, all-wheel drive is a key component of Alfa Romeo’s strategy.

Rüsselsheim, March 11, 2026 – For Alfa Romeo, all-wheel drive represents maximum sportiness and superior traction, even under the most challenging conditions. The technology, now known as Alfa^TM Q4, too ensures the dynamic precision that characterizes every model from the Italian marque. All-wheel drive is available in two different variants across the Alfa Romeo lineup: a purely mechanical system in the high-performance Giulia sedan and the premium Stelvio SUV, and an electrified system utilizing an electric motor on the rear axle in select versions of the Alfa Romeo Junior and Tonale.

Alfa Romeo has a long history with all-wheel drive technology. Engineers began experimenting with the technology as early as the 1920s on prototype vehicles. The first series production Alfa Romeo vehicle with all-wheel drive was the 1900 M off-road vehicle, launched 75 years ago. Its impressive capabilities earned it the nickname “Matta” (Crazy). The technology gained traction in passenger cars in the 1980s, with the Alfa Romeo 33 4×4 featuring all-wheel drive from 1984, initially in the station wagon and later in the sedan, utilizing an electromagnetic clutch to transfer power to the rear wheels.

1991 marked a turning point for the technology at Alfa Romeo. The Protéo concept car was the first to feature permanent four-wheel drive with a modern viscous coupling. Almost simultaneously, Alfa Romeo introduced this system in the series production 33 Permanent 4. From 1992, all all-wheel drive versions of Alfa Romeo carried the Q4 designation, initially in the 33, 155, and 164 ranges.

Alfa Romeo also demonstrated the technology’s performance in motorsport. Racing cars based on the Alfa Romeo 155 Q4 won the Italian Super Touring Championship in 1992 and the German Touring Car Masters (DTM) in 1993.

In subsequent years, the technology was further developed and expanded. The Alfa Romeo 156 saw the creation of the special Crosswagon version, while all-wheel drive became available across the 159 and Brera ranges. Alfa Romeo also offered the Spider convertible model with all-wheel drive for the first time.

With the move towards electrification, Alfa^TM Q4 now represents a modern generation of technology for Alfa Romeo. In the hybrid versions of the Alfa Romeo Junior Ibrida Q4 [fuel consumption: 5.4 l/100 km; CO₂ emissions 119–121 g/km; CO₂ class: D*] and the Alfa Romeo Tonale Ibrida Plug-in Q4 [energy consumption (weighted): 12.7-12.3 kWh electricity/100 km plus 3.7-3.4 l gasoline/100 km; CO₂ emissions 83-77 g/km; CO₂ class: B*], an internal combustion engine transmits power to the front axle, while the rear axle is driven by an electric motor. Because the two axles are not mechanically connected, the 4×4 system responds faster and weight is reduced.

The Alfa Romeo Giulia and Stelvio utilize a mechanical all-wheel drive system. Their Q4 system features an Active Transfer Case (ATC) that connects both axles and distributes engine torque in real-time. Under normal driving conditions, rear-wheel drive predominates, providing high precision when cornering. When needed, torque is progressively and seamlessly transferred to the front axle. This configuration provides superior traction and high driving stability and control. The Alfa^TM Q4 technology sets benchmarks in driving dynamics within the Alfa Romeo Giulia and Stelvio segments.

The Q4 system from Alfa Romeo guarantees maximum traction without compromising sportiness, a neutral and controllable driving experience, and safety in all road conditions. Customer appreciation for all-wheel drive is reflected in sales figures: in 2025, Q4 versions accounted for 26 percent of the model mix globally. Alfa Romeo recorded even higher figures for the Stelvio (90%) and Giulia (52%). The Alfa Romeo Tonale saw a 28 percent share of all-wheel drive versions, while the Alfa Romeo Junior reached 6 percent.

For Alfa Romeo, all-wheel drive has never been merely a technology, but an integral part of delivering maximum driving pleasure. Models with Q4 drive are particularly popular with those who enjoy winter sports or encounter low-grip roads and challenging weather conditions in their daily lives.

Current Alfa Romeo Models with All-Wheel Drive

The Alfa Romeo Junior Ibrida Q4

The Alfa Romeo Junior Ibrida Q4 delivers a system output of 107 kW (145 hp) from a 1.2-liter turbocharged engine producing 100 kW (136 hp) combined with a 48-volt hybrid system featuring two 21 kW electric motors. The front electric motor is integrated into the six-speed dual-clutch transmission and, together with the turbo engine, drives the front axle. The second electric unit on the rear axle operates independently and without a mechanical connection to the front axle’s powertrain. The rear electric motor is equipped with a reduction gear.

The drive system of the Alfa Romeo Junior Ibrida Q4 enables variable and optimal torque distribution to all four wheels, resulting in excellent traction under all road conditions. The system also reduces understeer: the Alfa Romeo Junior Ibrida Q4 exhibits less front-wheel slippage when cornering at speed, following steering movements more precisely. The special control of power generation (Power Looping) also ensures that the four-wheel drive system is always available, even with a discharged battery. In this case, the front electric motor generates the energy needed to operate the rear electric motor as a generator.

The drive of the Alfa Romeo Junior Ibrida Q4 allows for variable and therefore optimal distribution of torque to all four wheels. The result is excellent traction under all driving conditions. At the same time, the system reduces so-called understeer: the Alfa Romeo Junior Ibrida Q4 pushes less over the front wheels in fast corners, but follows the movements of the steering wheel precisely. The special control of power generation (Power Looping) also ensures that the four-wheel drive is always available, even with a discharged battery. In this case, the front electric motor generates the energy required to operate the rear electric motor.

The Alfa Romeo Junior Ibrida Q4 comes standard with the Alfa^TM D.N.A. Driving dynamics control system, offering four modes. DYNAMIC guarantees a particularly sporty driving experience with maximum performance utilizing the all-wheel drive system in boost mode up to 40 km/h. NATURAL is ideal for relaxed everyday driving. In the speed range of 0 to 90 km/h, the all-wheel drive system engages automatically when needed.

ADVANCED EFFICIENCY optimizes fuel consumption by adjusting the performance of the engines and the response of the accelerator pedal accordingly. The activation of the all-wheel drive system is analogous to the NATURAL mode, automatically engaging between 0 and 90 km/h when needed. Q4 controls the drive with the aim of optimal traction, recommended for road surfaces with low grip. Up to 30 km/h, the all-wheel drive works permanently; above that, automatic engagement occurs up to 90 km/h when needed, achieving an optimal balance between performance and efficiency.

This architecture enables the Alfa Romeo Junior Ibrida Q4 to achieve low fuel consumption and emissions while ensuring maximum safety and control.

Alfa Romeo Tonale Ibrida Plug-In Q4

The advanced hybrid system of the Alfa Romeo Tonale Ibrida Plug-In Q4 combines a turbocharged engine with an electric motor. The four-cylinder internal combustion engine with MultiAir valve control produces 110 kW (150 hp) from a displacement of 1.3 liters and is coupled with a six-speed automatic transmission, driving the front axle. The electric motor on the rear axle delivers 90 kW (122 hp) and a maximum torque of 250 Newton meters. The system output is 197 kW (268 hp).

The standard electrified all-wheel drive (e4WD) comes without a mechanical connection between the two axles. While the internal combustion engine transmits its power to the front axle via a six-speed automatic transmission, the electric motor drives the rear axle. The drive systems are electronically coordinated to ensure stability, traction, and particularly effective handling, even on slippery surfaces. The transitions between pure internal combustion engine operation and support from the electric motor are barely perceptible, positively impacting comfort.

To take into account the specific characteristics of the Alfa Romeo Tonale Ibrida Plug-In Q4 and optimize its efficiency and performance, the Alfa^TM D.N.A. Driving dynamics control system has been revised with regard to the special drive technology. Depending on the position of the control dial, the response of the all-wheel drive, the engines, the transmission, and the electronic driver assistance systems are automatically calibrated based on preset parameters. This avoids distraction from road traffic caused by manual management of individual menu items.

In ADVANCED EFFICIENCY mode, the Alfa Romeo Tonale Plug-In Hybrid Q4 is programmed for maximum energy efficiency. ADVANCED EFFICIENCY also offers two additional functions. So-called sailing disengages the drive completely when the accelerator pedal is released to allow the vehicle to roll with less resistance. When driving downhill, the electronic hill descent control (eCoasting Descent Control) can be activated with a light press on the accelerator or brake pedal.

DYNAMIC mode fully exploits the vehicle’s performance and simultaneously adjusts the steering to be particularly direct. NATURAL mode activates the all-wheel drive. The interaction between the internal combustion engine and the electric motor is automatically controlled, focusing on energy and fuel savings without compromising performance.

In addition to realizing all-wheel drive under all conditions, the Alfa Romeo Tonale Plug-In Hybrid Q4 offers unparalleled performance in its segment: the compact premium SUV accelerates from a standstill to 100 km/h in 6.6 seconds and reaches a top speed of 195 km/h.

Alfa Romeo Giulia and Alfa Romeo Stelvio with Q4 Technology

The variable all-wheel drive system Alfa^TM Q4 used in the Giulia and Stelvio models is one of Alfa Romeo’s most distinctive technologies. This variant was developed to provide maximum control in all road conditions without compromising the driving fun typical of rear-wheel drive. The Q4 drive in the Alfa Romeo Giulia and Stelvio controls torque distribution in real-time, combining low fuel consumption, responsiveness, and the dynamic characteristics of rear-wheel drive with high performance and safety.

The Q4 technology is available in the Alfa Romeo Giulia in combination with a 232 kW (280 hp) 2.0-liter turbocharged engine[1] and a 2.2-liter turbocharged diesel engine producing 154 kW (210 hp) [fuel consumption: 5.4-5.8 l/100 km; CO2 emissions 141-152 g/km; CO2 class: E]. The Alfa Romeo Stelvio offers identical drive configurations [fuel consumption Alfa Romeo Stelvio 2.2 Diesel 16V: 6.0-6.6 l/100 km; CO2 emissions 157-173 g/km; CO2 class: F]. The top-of-the-line Alfa Romeo Stelvio Quadrifoglio is exclusively manufactured with Q4 drive, its V6 biturbo gasoline engine producing 382 kW (520 hp) [fuel consumption: 11.8 l/100 km; CO2 emissions 267 g/km; CO2 class: G].

The Alfa^TM Q4 all-wheel drive system in the Alfa Romeo Giulia and Stelvio guarantees impressive dynamics and precise handling in every driving situation. The technological heart of the system is the compact Active Transfer Case (ATC), weighing around 60 kg and equipped with an electronically controlled, active clutch. The front axle differential is also designed for high torque. The interaction of both components ensures constant control of the driving dynamics, monitoring parameters such as wheel speed, transverse and longitudinal acceleration, steering angle, and accelerator pedal position.

Depending on the driving conditions and the grip level of each individual tire, the system distributes the engine torque between the front and rear axles. Under normal conditions, power is completely transferred to the rear axle via the cardan shaft made of the high-tech material carbon fiber, reducing consumption and providing particularly agile and precise handling.

If slip occurs at the rear wheels, for example in rain, snow, or during strong acceleration, the control electronics react within fractions of a second and transfer up to 60 percent of the torque to the front axle. This strategy ensures high traction, superior performance, unparalleled driving fun, and high safety even in difficult road conditions.

The integrated actuator enables a very fast adjustment of the torque distribution to the selected mode of the Alfa^TM D.N.A. Driving dynamics control. This ensures faster response times than conventional all-wheel drive systems and high overall efficiency. A special feature of Alfa^TM Q4 is the ability to manage up to 2.5 percent slip between the front and rear axles, improving traction, directional stability, and cornering precision.

* Combined values according to WLTP. The values of a vehicle depend not only on the efficient use of fuel by the vehicle, but also on driving behavior and other non-technical factors. 

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[1] Alfa Romeo Giulia and Alfa Romeo Stelvio are currently not available in Germany with a 2.0-liter turbocharged engine. Consumption figures are not available from the manufacturer.