Redline Xtreme vs Pepsi: which has more caffeine?

Redline Xtreme has more caffeine than Pepsi on both counts: 316mg per 8 oz bottle against 38mg per 12 oz can, and about 40mg per fluid ounce against 3. The serving sizes differ, so the table below shows both ways of counting.

These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.

Redline Xtreme vs Pepsi: the numbers

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

The concentration gap is the striking part: Redline Xtreme packs roughly 12 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 Pepsi 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
• Pepsi: 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 Pepsi have more caffeine? Redline Xtreme: 316mg per 8 oz bottle versus 38mg per 12 oz can for Pepsi.

Which is stronger per ounce? Redline Xtreme, at about 39.5mg per fluid ounce versus 3.2mg for Pepsi.