The most unique has got to be a 4 rotor RX8 (rotary engine).<p>Back when I had an RX8, I wanted to convert it&#x27;s stock 2 rotor over to a 3 or 4 rotor purely because of this engine sound!<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=P4Fgi1OQqao" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=P4Fgi1OQqao</a><p>The rotary engine is amazing. In the RX8, the powerband kicks in around 4500-5000 rpm, and pulls strong right up through the redline at 9500 rpm. The engine loves high rpm! You can sit in 3rd gear running at 8500 rpm at 80+ mph on the highway and it&#x27;ll just take it without question. The BMI 4 rotor has a much higher redline, if I recall, near 11,000+ rpm.