BMW engineers have developed a technique for changing the way a driver perceives engine noise, which is sophisticated enough make a diesel engined car sound like it is powered by a high-revving petrol unit.
BMW engineers have built two experimental prototypes, a 635d and a Mini Clubman with the option of four different engine notes including one that sound to its occupants like an old-fashioned ‘muscle car’ V8 engine.
You can hear the system at work in the video below.
The company says that the technique dubbed ‘Active Sound Design’ and utilizing the car’s own sound-system is so effective that test drivers in vehicles equipped with the set-up perceived their cars to be performing better than standard test vehicles with identical performance.
The prototype is based on 635d, which has been treated to BMW’s new ‘acoustic lightweight construction’ techniques, which uses new lightweight sound and vibration deadening materials in the engine bay and under the car.