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
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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