How luxury cars like Rolls Royce isolate the passengers and the car body from engine and transmitter vibrations, to the point that you can balance a coin on the hood of the car and it’s not going to flip over.
In: Engineering
Engine dampers/bushings.
And engine piston layout. For every cylinder being pushed up, there is a cylinder being pulled down. There is a lot of weight being thrown around these engines, and with careful planning you can eliminate the shaking.
They use rubber bushings to isolate anything that makes vibrations from the body. The engine, transmission, differential, tires, etc.
At the highest end like RR, the bushings aren’t just regular rubber, it’s a special compound that’s optimized to absorb vibrations.
The other thing is, companies like RR go well out of their way to reduce or eliminate vibrations from existing in the first place by ensuring perfect balance on parts. Their engines are balanced so well that you can balance a coin not just on the hood of the car, but directly on the engine itself, because it simply isn’t vibrating in the first place.
It’s all about those advanced engine mounts and sound insulating materials. Plus, they probably spend more on reducing noise and vibrations than most of us do on the actual car. 😅
The biggest factor is the V12 engine they use. The higher number of cylinders makes the power delivery much smoother (smaller gaps between firing cylinders) as well as improving the balance of the engine overall. Another factor is the weight of the car. The more mass the car has, the more damping provided.
That said, not many modern cars have enough engine vibration to flip a coin on the hood. Modern engineering has improved engine balance so you really shouldn’t see that happening. If it’s still being advertised by RR, it’s likely just a legacy marketing gimmick.
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