This Porsche 928 bears a striking resemblance to a creation from the set designers of ‘Mad Max’ or a prototype time machine from ‘Back to the Future’. However, it is much more than just a visually intriguing vehicle. The Porsche 928 is actually an endurance runner, serving as a rolling test bench with a rich and extensive history.
Originally developed over 30 years ago at Porsche’s Weissach test and development center, the 928 noise test vehicle has become a legendary figure in the world of vehicle acoustics. Dubbed a “dinosaur” by Harald Mann, a seasoned test engineer, this unique vehicle has been instrumental in ensuring that Porsche‘s vehicles meet noise emission requirements.
What sets the Porsche 928 noise test vehicle apart from other test vehicles is its focus on capturing external noise-relevant parameters during drive-by tests. This means that the vehicle was designed specifically to generate the necessary data to ensure compliance with legal noise standards. Its powerful lower engine speed range made it the perfect candidate for such testing, surpassing other models like the 924, 944, or air-cooled 911.
The evolution of the 928 noise test vehicle over the years has been nothing short of impressive. Engineers have meticulously insulated and modified the vehicle, going as far as encapsulating the engine compartment and adding scoops on the bonnet for additional cooling. These modifications have allowed the vehicle to achieve an impressive noise level of 63 dB (A) with slick tires, making it a standout in the automotive world.
The testing routine for the 928 noise test vehicle is rigorous and precise. Accelerating to 30 mph and passing by microphones over a 20-meter stretch at a minimum of 37 mph, the vehicle showcases its exceptional performance and quietness. It is no wonder that it is considered “probably the quietest 928 in the world.”
Today, the Porsche 928 noise test vehicle proudly sits in the Porsche Museum, a testament to its enduring legacy and contribution to the world of automotive engineering. Its role in ensuring that Porsche’s vehicles meet noise emission standards showcases the brand’s commitment to excellence and innovation in every aspect of vehicle design and performance.