Page 1 of 1 The heart of the Bonneville GXP is its 4.6-liter, 32-valve V-8 engine, the first eight-cylinder in a Bonneville since 1986 and the first 32-valve engine in Pontiac's history. The dual overhead-cam powerplant produces 275 horsepower. Supporting the performance nature of the car, the engine is tuned to provide maximum torque at a relatively low 5600 rpm, allowing the car to launch itself from zero to 60 mph in approximately 6.8 seconds. The high-tech design of the 4.6-liter engine allows for smooth, quiet operation without sacrificing the power expected from a high-performance touring sedan. Features such as polymer-coated pistons, coil-on-plug ignition and timing chains (rather than belts) enhance the engine's refinement and durability.
Power from the engine is routed through a Hydramatic 4T80-E four-speed automatic transmission. Specifically designed to link with the 4.6-liter engine, the transmission electronically monitors the way the driver is using both the throttle and brake, adapting shift points to provide the optimal balance of performance and fuel economy. The Bonneville GXP has a final drive ratio of 3.7:1, one of the most aggressive in its class. Traction control is standard.
Custom engineered for the Bonneville GXP, the suspension system more closely resembles a Le Mans racer than a production vehicle. More than 1,000 hours were spent modeling, testing and refining the balance of the components to create a superior ride with a true performance feel. Structural rigidity was increased through the use of a tower-to-tower brace and a specially dampened engine cradle mounting package. Performance-tuned DeCarbon monotube dampeners, progressive spring rates and large diameter (30-mm front, 22-mm rear) stabilizer bars allow the Bonneville GXP to provide both excellent driver feedback and a smooth, compliant ride.
Enhancing driver performance and safety, the standard StabiliTrak stability enhancement system constantly senses wheel turn rates and vehicle motion physics. Unlike some other stability systems on the market, StabiliTrak respects the driver's instincts and intervenes in a very subtle way. If the system determines the vehicle is beginning to perform in a manner inconsistent with the driver's inputs, StabiliTrak will automatically and selectively apply individual wheel brakes to attempt to keep the vehicle squarely under the driver's control.
Inside, luxury and functionality are fused to create a unique driving environment designed to closely connect the driver with the vehicle. The Bonneville GXP features leather-appointed seats in one of two interior colors, neutral or dark gray, both with UtraLux suede inserts, 12-way power adjustment, and two-position personalized memory. The high-tech look of carbon fiber trim around the steering wheel, door handles and air vents is accented by stain nickel accents and stainless steel pedals. The full gauge cluster features a unique silver background. Important information such as speed, turn signals and low fuel warnings can also be projected on the windshield through the optional EyeCue head-up display (HUD). Page 1 of 1
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Bonneville GXP
The heart of the Bonneville GXP is its 4.6-liter, 32-valve V-8 engine, the first eight-cylinder in a Bonneville since 1986 and the first 32-valve engine in Pontiac's history. The dual overhead-cam powerplant produces 275 horsepower. Supporting the performance nature of the car, the engine is tuned to provide maximum torque at a relatively low 5600 rpm, allowing the car to launch itself from zero to 60 mph in approximately 6.8 seconds. The high-tech design of the 4.6-liter engine allows for smooth, quiet operation without sacrificing the power expected from a high-performance touring sedan. Features such as polymer-coated pistons, coil-on-plug ignition and timing chains (rather than belts) enhance the engine's refinement and durability.