The MLB Evo Platform
The backbone of the Audi Q8 is the MLB Evo (Modularer Längsbaukasten Evolution) longitudinal modular
platform. This architecture is shared with the royalty of Volkswagen Group SUVs: Lamborghini Urus, Bentley
Bentayga, and Porsche Cayenne. The choice of this platform, rather than cheaper bases, was fundamental to
guarantee the dynamic characteristics of the Q8.
The body construction utilizes the multi-material "Audi Space Frame" concept. It combines ultra-high-strength
steels (hot-formed) in the passenger survival cell with aluminum castings and laminates in the suspension
areas, hood, doors, and tailgate. The goal of this mixture is to reduce the total weight — although the car
still exceeds 2,100 kg at curb weight — and, more importantly, to lower the center of gravity to improve
drivability.
Chassis Dynamics and Suspension
To mitigate the physics of a tall and heavy vehicle, Audi equipped the Q8 with a technological
arsenal:
- Adaptive Air Suspension: Standard on many versions and optional on others,
this system allows varying the vehicle's height by up to 90 mm. In "Dynamic" mode, the car crouches to
improve aerodynamics and the center of gravity; in "Off-road" mode, it raises to overcome obstacles,
guaranteeing a ground clearance of up to 254 mm.
- All-Wheel Steering: An electromechanical system can turn the rear wheels by
up to 5 degrees. At low speeds (parking maneuvers), they turn in the opposite direction of the front
ones, reducing the turning circle by about a meter. At high speeds (highway lane changes), they turn in
the same direction, virtually increasing the wheelbase and stability.
- Electromechanical Active Roll Stabilization (eAWS): Available on the SQ8
and RS Q8 versions, this system uses electric motors on the front and rear stabilizer bars. On
straights, the bars are decoupled to absorb irregularities independently on each wheel (comfort). In
corners, the motors twist the bars against each other, negating body roll and keeping the car flat,
defying centrifugal force.
48-Volt Electrical System (MHEV)
The Q8 was one of the pioneers in popularizing the 48-volt Mild Hybrid Electric Vehicle (MHEV)
system. Unlike traditional hybrids, this system does not move the car alone for long distances, but acts as
a critical support for efficiency and comfort.
The central component is the Belt Alternator Starter (BAS), connected to the crankshaft. It allows
the Q8 to recover up to 12 kW of energy during deceleration and store it in a compact lithium-ion battery in
the trunk. This energy enables the "coasting" function: between 55 and 160 km/h, if the driver takes their
foot off the accelerator, the combustion engine can shut off completely for up to 40 seconds, with the car
gliding without emissions. As soon as the accelerator is touched, the BAS restarts the engine imperceptibly.