2018 Harley-Davidson Road Glide Special - Dyno Numbers

Horsepower and torque from the 107 Milwaukee-Eight

Harley-Davidson introduced the 107 Milwaukee-Eight platform last year in its Touring models. The M8 is H-D's ninth Big Twin, a dual-spark-plug, single-camshaft, 1750cc V-twin with oil-cooled, four-valve-per-cylinder heads. The Milwaukee-Eight reportedly has 50 percent better intake/exhaust airflow than its Twin Cam predecessor, resulting in a claimed 10 percent gain in torque.

For 2018, Harley didn't make any changes to the Milwaukee-Eight 107, but the Road and Street Glide "Specials" were revamped. Previously, they were fitted with a 7-inch touchscreen infotainment system, as well as a gloss-black inner fairing, which differentiated them from the standard models.

For 2018, the Specials have adopted the styling of the Road King Special that was introduced as a 2017 mid-year model. This new styling is easily summed up as "blacked-out." In addition to the 7-inch touchscreen infotainment system and a gloss-black inner fairing, the Specials now have extended saddlebag lowers and loads of black accessories and trim.

2018 Harley-Davidson Road Glide Special dyno chartJon McDevitt

On our in-house dynamometer, a 2018 Harley-Davidson Road Glide Special powered by a 107 cubic-inch Milwaukee-Eight produced 77.34 horsepower and 101.46 pound-feet of torque.