From Car Connection: http://www.thecarconnection.com/Vehi...84.A10100.html "Strict adherence to the latest SAE testing standards have the new Civic Si's engine rated at 197 horsepower instead of 200 but that doesn't mean there are no differences between it and the similar powerplant in the RSX Type-S. Code-named K20Z3, the Civic SI's all-aluminum engine is a member of Honda's K-Series family and shares, bore, stroke, displacement, DOHC cylinder-head design, four-valve combustion chambers, 11.0:1 compression ratio and a thrilling 8000 rpm redline with the 201-horsepower K20Z1 used in the 2006 RSX Type-S. However it has a balance shaft that produces smoother operation but increases parasitic drag. In compensation for that the K20Z3 uses electric power steering and also incorporates an electric throttle and its own unique aluminum intake manifold"
Honda (and other car manufacturers) might have underrated engine power, but I don't think Acura has ever done that... no reason to with a premium/luxury brand.
