The quest soon became for a 500cc engine that would spin to 11,000 rpm yet idle patiently at a mere 1,000 rpm. The result was what Honda internally labeled as its "REV" mechanism, or "HYPER VTEC ...

The Honda CRX Si eschewed the ultra-efficient character ... This version of the Integra featured a screaming 1.7-liter four-cylinder engine that introduced VTEC variable valve timing to America ...