Better yet: QUOTE:
In 1996, American Honda dropped the Si badge and called the top of the line Civic model the EX (127hp SOHC VTEC D16Y8 engine). Honda Canada continued to use the Si badge for the exact same car (127hp SOHC VTEC D16Y8). I would guess that Honda Canada looked at the fact that the '92 to '95 125 horsepower D16Z6 Civic Si coupe was essentailly the same car as the '96 127 horsepower D16Y8 coupe (the engines are almost identical) and decided that the Si badge should stay.
When Honda decided to bring the DOHC VTEC 160hp B16A2 Civic to North America, American Honda ressurected the Si badge, while Honda Canada used the SiR badge, since they were still selling a Civic called the Si.
So for 1999 and 2000, Canadian Si = US EX, Canadian SiR = US Si. The same is true for the new 2002 and later civic hatchback - the Canadian model is the SiR, and the US model is the Si.