2018 Harley-Davidson Road Glide Ultra 107 Dyno | Cycle World

2018 Harley-Davidson Road Glide Ultra 107 Dyno

The Motor Company’s Twin-Cooled Milwaukee-Eight produces more than 100 pound-feet of torque

The 2018 Harley-Davidson Road Glide Ultra has a starting suggested retail price of $26,399 and is available in seven colors, four solids and three two-tones. Powering this American-made machine is an air/liquid-cooled, four-valves-per-cylinder, 1746cc (100.0 x 111.1mm) V-twin.

We ran the Road Glide Ultra on our rear-wheel dyno in fourth gear to determine peak output from the Twin-Cooled Milwaukee-Eight 107 engine. We documented 78.27 hp at 4,910 rpm and 101.66 pound-feet of torque at 2,810 rpm.

Road Glide Ultra dyno

2018 Harley-Davidson Road Glide Ultra Dyno Chart

Robert Martin

For comparison purposes, a 2018 Harley-Davidson Street Glide Special with the standard Milwaukee-Eight 107 that we recently tested produced identical power (78.43 hp at 5,280 rpm) but slightly more torque (104.44 pound-feet of torque at 2,649 rpm).


“Because these new, larger-displacement engines take up less heat from combustion and employ strategic exhaust-valve cooling, they can safely operate at high compression ratios (now as high as 10.5:1) that produce greater power and torque.”—Kevin Cameron


3M Peltor Optime 105 ear protectors

Our preferred hearing protection while in the dyno room is 3M’s Peltor Optime 105 ear protectors.

Jon McDevitt


Engine Specifications:

ENGINE Twin-Cooled Milwaukee-Eight 107
BORE 3.937 in.
STROKE 4.375 in.
DISPLACEMENT 1746cc (107ci)
COMPRESSION RATIO 10.0:1
FUEL SYSTEM Electronic Sequential Port Fuel Injection (ESPFI)
EXHAUST Chrome dual exhaust with 4-in. touring mufflers

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