Definitely The CRX

Question of the Day: Most fun under 100 horsepower?

[T]he 1986-87 Honda Civic CRX Si, with 91 mighty horsepower. The early CRX Si, weighing well under a ton, will bring a smile to the face of even the most power-obsessed driver today, 30 years after it was built.

(AutoBlog.com)