Power-to-weight ratio (PWR) has been identified as one of the best measuring tools to identify and predict your performance level. It tells you how much power you put out per kg of body mass. The higher your watts/kg, the faster you should be.
Where you really see the difference of PWR is on a climb. The best way to improve your PWR is with intervals and structured training.
On one of your longer rides (probably over a weekend – 3 – 4 hours), do 2 x 20-minute intervals - both on climbs. These should be done at 85 – 95% of your FTP (functional threshold power – this is the highest number of watts you can sustain for an hour). If you don’t know what your FTP is and you don’t have a power meter, do these as low-torque intervals (very heavy gear that you can just turn over without standing).
Make sure you’re structuring your training to focus on improving your PWR and be the best climber you can be.