10 differences Between Robusta & Arabica Coffee September 19, 2014. You may have noticed that some coffee bag labels brag about the fact that their coffee beans are 100% Arabica.Although the specific caffeine levels vary, cold-brewed coffee has more caffeine than any other way of making coffee. In fact, cold-brewed arabica coffee can rival the caffeine levels of robusta espresso and brewed coffee.Robusta coffee beans have on average 83% more caffeine than arabica beans, so making coffee with these beans will produce a cup of coffee with 83% more caffeine. According to CoffeeChemistry.com a robusta bean is 2.2% caffeine, while an arabica bean is 1.2% caffeine.In Arabica coffee, caffeine content averages at 1.2% while Robusta at 2.2%. It is believed that this larger level of caffeine allows for robusta plants to thrive in more hostile environments as caffeine acts as a chemosterilant for insects.Third, arabica has about half as much caffeine as robusta. A natural pesticide, caffeine helps fend off disease and pests, but it also tastes bitter. A natural pesticide, caffeine helps fend off disease and pests, but it also tastes bitter.Of the two main species grown, arabica coffee (from C. arabica) is generally more highly regarded than robusta coffee (from C. canephora); robusta tends to be bitter and have less flavor but better body than arabica.This means coffee brewed purely from robusta beans will have a higher caffeine content than arabica coffee. Even within these two species, there is a small variation in the levels of caffeine present between different varietals (different “breeds” of the same species).The two species most widely cultivated commercially are Coffea arabica (aka Arabica) and Coffea canephora (aka Robusta). Of the two Arabica is by far the more popular, comprising about 75-80% of …
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