I did get to hear a Diablo. The sound was powerful and energizing. Back in the late 90s I did a cross-country bike ride from Oregon to Washington DC. I was climbing up Teton Pass and was struggling. Someone was having some fun on the pass driving a Diablo. Every time the Diablo drove by I got a burst of energy that helped me make it up the pass. The engine sound of the Diablo was more throaty and powerful than I thought a V12 Italian exotic would sound like. Impressive sound signature.