Redline Xtreme vs Rockstar Original: which has more caffeine?

Redline Xtreme has more caffeine than Rockstar Original on both counts: 316mg per 8 oz bottle against 160mg per 16 oz can, and about 40mg per fluid ounce against 10. The serving sizes differ, so the table below shows both ways of counting.

Redline Xtreme vs Rockstar Original: the numbers

Sources: Redline Xtreme's figure is verified in our Redline Xtreme caffeine guide against Caffeine Informer (source); Rockstar Original's figure is verified in our Rockstar Original guide against Rockstar product page (source).

The concentration gap is the striking part: Redline Xtreme packs roughly 4 times the caffeine per ounce. Sipping speed matters at that density; a 8 oz bottle finished in minutes hits differently than the same milligrams spread over a slow cup.

Which one should you pick?

Pick Rockstar Original when you want the lighter dose or a slower ramp, and Redline Xtreme when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.

For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.

Related reading

• Redline Xtreme: the full caffeine guide
• Rockstar Original: the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Does Redline Xtreme or Rockstar Original have more caffeine? Redline Xtreme: 316mg per 8 oz bottle versus 160mg per 16 oz can for Rockstar Original.

Which is stronger per ounce? Redline Xtreme, at about 39.5mg per fluid ounce versus 10.0mg for Rockstar Original.