Horsepower
The CR80 has a liquid-cooled, two-stroke engine that produces around 20 horsepower. The XR80 has an air-cooled, four-stroke engine that produces around 6 horsepower. This means that the CR80 has significantly more power than the XR80.
Speed
The CR80 has a top speed of around 50 mph, while the XR80 has a top speed of around 30 mph. This means that the CR80 is much faster than the XR80.
Other differences
In addition to the differences in horsepower and speed, the CR80 and XR80 also have different suspensions, brakes, and tires. The CR80 has a more aggressive suspension and brakes, which are better suited for motocross racing. The XR80 has a more comfortable suspension and brakes, which are better suited for trail riding.
Conclusion
The Honda CR80 and XR80 are two very different bikes, each with its own strengths and weaknesses. The CR80 is more powerful and faster, while the XR80 is more comfortable and easier to ride. Ultimately, the best bike for you depends on your riding style and experience.