Sirio .21 WCR vs. RB Xenon R

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11-13-2007, 08:08 PM

bsmooth

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Sirio .21 WCR vs. RB Xenon R

Could anyone give some insight on these two engines? I know they are both Sirio based, but what are the power differences, fuel mileage, durability, etc...

Thanks in advance.

-Steve

11-15-2007, 06:43 AM

Grinder

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Quote:

Originally Posted by bsmooth

Could anyone give some insight on these two engines? I know they are both Sirio based, but what are the power differences, fuel mileage, durability, etc...

Thanks in advance.

-Steve

Both of these engines feel similar on the racetrack. The Xenon R may have a slight edge in the torque department. Both get excellent fuel mileage. Both also work great with the 2013 pipe and header.