Indian's NEW 108" PowerPlus Engine

Indian Motorcycle announced the launch of its most powerful engine to date, the PowerPlus. The all-new 108 cubic inch, liquid-cooled, V-twin engine delivers 122 horsepower and 128 ft-lbs. of torque and establishes a dramatically new standard for V-twin performance.

The PowerPlus will serve as the heart of the new Indian Challenger, an all-new, fixed-fairing bagger that utilizes Indian Motorcycle’s state-of-the-art technology to become the highest-performing American V-twin ever developed. The new engine’s name is a nod to Indian Motorcycle’s iconic history, paying homage to the Indian PowerPlus motorcycle produced from 1916 to 1924.

The PowerPlus adopts several design and performance features from the liquid-cooled 1,133 cc Indian Scout engine, including an overhead camshaft design utilizing four valves per cylinder. But comparisons end there. The PowerPlus was developed with a big-piston, big-torque mindset with an end game of maximum power delivery across the entire curve.

“We challenge our engineers with the notion that anything less than best-in-class design and performance will simply not get it done, and it’s clear with this new engine that they have delivered on that high standard,” said Steve Menneto, Indian Motorcycle President. “Countless hours were spent in design, development and testing to ensure this is the best liquid-cooled V-twin ever developed, and I could not be prouder of our team and this incredible motor.” 

Indian Motorcycle PowerPlus Engine Specifications:

• Engine Displacement: 108 cubic inches (1,769 cc)
• Power: 122 hp at 5,500 RPM
• Torque: 128 ft-lbs at 3,800 RPM
• Maximum Engine Speed: 6,500 RPM
• Architecture: 60-degree V-twin, liquid-cooled powerplant
• Crankcase: Unit design featuring a high capacity semi-dry sump oil system
• Timing System: Overhead camshafts and four valves per cylinder
• Fuel System: Electronic fuel injection. 52mm dual bore throttle bodies
• Compression Ratio: 11:1
• Transmission: Six-speed with true overdrive, constant mesh
• Clutch: Assist clutch

The PowerPlus will be built in Osceola, Wisconsin with final motorcycle assembly taking place in Indian Motorcycle’s production facility in Spirit Lake, Iowa.