The technical basis of the Alfa Romeo 159 is the GM/Fiat Premium platform, an architecture that
encapsulates the car's greatest strengths and deepest weaknesses. Its conception and implementation tell the
story of ambitious engineering, but also of a strategic compromise that would define the model's destiny.
Origins and Ambition of the Platform
Developed in the early 2000s, with significant contributions from Saab engineers, the Premium
platform was conceived as a top-tier architecture for front- and all-wheel-drive vehicles. Its goal was to
provide a rigid and sophisticated foundation, capable of supporting high-level driving dynamics and elevated
safety standards, suitable for the executive segment.
The Fortress of the Chassis
The greatest virtue of the Premium platform was its exceptional structural integrity. It gave the 159
class-leading torsional rigidity, reaching 180,000 daNm/rad. This extremely stiff structure was the
foundation for remarkable passive safety, validated by achieving the maximum five-star rating in Euro NCAP
crash tests. This was a crucial selling point and a massive improvement over its predecessor, the 156.
The "Achilles Heel" - Excessive Weight
Despite its robustness, the platform contained a critical flaw: weight. The late decision to transfer
the 159 project to this architecture, which was fundamentally designed for larger E-segment cars, resulted
in excessive weight. The curb weight ranged from approximately 1,400 kg to nearly 1,700 kg in the most
equipped versions, a substantial increase over the 156. This weight penalty became the car's most defining
compromise, negatively affecting performance, fuel efficiency, and agility—aspects that were traditionally
Alfa Romeo's strong points.
Suspension Analysis
To manage its weight and fulfill its dynamic ambitions, the 159 was equipped with a highly sophisticated
suspension system. At the front, it utilized a "high double wishbone" setup, while the rear adopted a
multilink system. These designs are inherently superior for controlling wheel geometry and driving
precision, providing excellent grip and stability. However, this complexity also contributed to the overall
weight as well as the vehicle's production and maintenance costs.
"Q4" All-Wheel Drive System
Available on the top-tier powertrains (3.2 V6 and 2.4 JTDm), the "Q4" all-wheel drive system was an
advanced piece of engineering. It utilized a Torsen Type-C center differential which, under normal
conditions, distributed torque with a slight rear-axle bias (e.g., 43:57), preserving a sporty
rear-wheel-drive feel. The system significantly improved traction and stability in low-grip conditions,
without the typical understeer of many all-wheel drive systems of the time.
The Platform as an Expensive "Orphan"
The history of the Premium platform is marked by abandonment. General Motors eventually discarded its
use, considering it too expensive for its brands like Opel and Saab. Fiat, having already invested heavily
in its development, was left with an "orphan" platform and had to try to amortize the costs through the 159,
Brera, and Spider models. This meant the enormous development costs had to be diluted over a relatively low
production volume — only 247,661 units for the 159. This high unit cost of the platform likely forced Alfa
Romeo to adopt a less competitive pricing strategy, hindering profitable competition against German rivals,
whose platforms were shared across millions of vehicles. The 159 was, from its foundation, an
over-engineered and expensive car to produce, a financial burden that ultimately contributed to its
premature demise.