Indian Launches PowerPlus Liquid Cooled Engine

Plus Sized Model

Indian Motorcycle let loose with its most powerful engine to date, the PowerPlus today. It’s a 108-inch liquid-cooled V-twin. The reported numbers: 122 horsepower and 128 ft-lbs. of torque.


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.

Indian PowerPlus engine
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.

“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 powerplus engine

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.

The all-new powertrain features a six-speed transmission with true overdrive, assist clutch to reduce clutch effort, and three ride modes that allow riders to tailor throttle mapping to their riding preferences. Advanced technology also includes hydraulic valve lash adjusters and hydraulic camshaft chain tensioners for ease of maintenance and reliability.

Indian powerplus engine
The PowerPlus was tested, refined and proven by one of the industry’s most rigorous development and testing programs, accumulating nearly one million miles of simulated testing, including state-of-the-art dyno testing, and more than 250,000 on-road miles.

“You simply cannot deliver the ultimate bagger without an engine that stands head and shoulders above anything else in its class, and that was the motivation behind the PowerPlus,” said John Callahan, Indian Motorcycle Vice President, Engineering. “We developed the most sophisticated V-twin powerplant in the industry, and then we spent month after month, hour upon hour, putting it through the most intense paces to ensure it could take whatever we threw at it. The end result is something truly special.”

indian powerplus engine

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
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