
The Road Glide Special is everything I envision a bad-ass Bagger should be. The 2021 Harley Davidson lineup has three “Specials” and based on the vast level of choices offered, Harley Davidson knows these make up their most popular offerings.

The FLH-model panhead engine was available to riders from the 1955 model year through 1964. The F's compression ratio was 6.6 to 1 while the FL model's ratio was 7 to 1. Generating 9.44 horsepower, this panhead engine's compression ratio also deviated slightly between the two models. The only differences between the E and the EL are the compression ratios, which are reported at 6.5 to 1 for the E and 7 to 1 for the EL engine.Īll F and FL engines were 74 cubic inches and had bore and stroke of 3.4 inches by 3.9 inches. Bore and stroke of the E and EL panhead engine were 3.3 inches by 3.5 inches. The Panhead E and EL engines had displacement of 61 cubic inches and generated 8.77 horsepower. Though Harley offered a number of different trim levels for each of its bikes that used the panhead engines, there were only three main panhead versions: a 61-cubic-inch model, an early 74-cubic-inch model that offered slightly more power, and a later 74-cubic-inch with dramatically more power. The Harley-Davidson "panhead" engine is a vintage motorcycle engine that the iconic American motor company utilized in many of its motorcycle models manufactured from 1948 to 1965, when the engine was retired for an updated model.
