The 2004 Triumph America is powered by the same unit that powers its “Bonnie” parent: a 790cc, four-stroke, air-cooled, parallel twin (two-cylinder) engine. Paired with a five-speed manual transmission, the engine generates 61 horsepower at 6800 revolutions per minute and 44.3 lb-ft of torque at 4800 rpm. Four intake valves go on each cylinder for a grand total of eight. The bore and stroke is 3.39 by 2.68 inches (86 by 68 millimeters), and the compression ratio is 9.2 to 1. Two carburetors blend the air and fuel for the engine, and an electric starter is in place for starting the engine. Each 2004 America has a gas tank that can hold up to 4.4 gallons (16.6 liters).