Quote Originally Posted by Ronsam2006
The Renesis motor from the Rx-8 was definitely a fail. Sure the 7 bolt has its fualts, but which motor doesn't. The 6 bolt 4G63 however, was probably the best 4 cylinder turbo motor ever built.
I'll explain to you why it wasn;t a fail. Compare it to the N/A 13b that came before it. Compare how much worse the emissions were from that engine to the Renesis. Why else did it win so many awards.

i hate to quote wiki but......

These and other innovative technologies allow the Renesis to achieve 49% higher output and dramatically reduced fuel consumption and emissions (the RX-8 meets LEV-II). It won International Engine of the Year and Best New Engine awards 2003 and also holds the "2.5 to 3 litre" size award for 2003 and 2004, where it is considered a 2.60 L engine. Finally, it was on the Ward's 10 Best Engines list for 2004 and 2005.

The Renesis has also been adapted for a dual-fuel use, allowing it to run either on gasoline or hydrogen.


4G63 is a turbo motor so efficiency cant be compared to an N/A motor. And Honda's F22c is still the highest HP/Liter ever on that front.