Harley-Davidson Engine Size Chart: Every Displacement by Family and Year (2026)

Every Harley-Davidson engine from the flathead era through the Milwaukee-8 era carries a specific displacement – measured in both cubic inches (ci) and cubic centimeters (cc) – that defines its performance character, parts compatibility, and tuning potential. Our research team cross-referenced a library of 58 HD service manuals spanning 1970 through 2016, plus official Harley-Davidson specification sheets for post-2017 models, to build the most source-verified engine size chart available online.

This reference covers every major production engine family in displacement order, with the year ranges and model lines each engine powered. If you are sourcing parts, planning an upgrade, or trying to decode a VIN, use this chart as your verified starting point.

Harley-Davidson Engine Size Chart: Complete Displacement Table

The table below maps every major HD engine family to its exact displacement, production years, and the model lines it powered. Specs marked with a service manual citation are verified from primary sources in our research library.

Twin Cam Engine Breakdown: 88, 96, 103, and 110

The Twin Cam era (1999-2017) is where most secondhand Harley purchases land today, and the displacement confusion here is common. The naming convention is straightforward: the number after “Twin Cam” corresponds directly to the engine’s approximate cubic-inch displacement.

Our research cross-referenced four service manuals – the 2004 Touring, 2008 Dyna, 2007 Softail, and 2011 and 2013 Touring manuals – to lock down the exact figures that HD published for each variant.

• Twin Cam 88 (1450cc): The entry point for the era. Debuted in 1999 on Touring and Dyna models, replacing the Evolution 80ci. Per the 2004 Touring service manual: “Piston displacement (approx.) 88 cu. in. (1450 cc).” Ran through 2006 in most lines.
• Twin Cam 96 (1584-1585cc): Introduced for the 2007 model year. The 2008 Dyna service manual confirms 96 cubic in. / 1584 cc. The “B” suffix (Twin Cam 96B) designates the counterbalanced Softail variant – same displacement, added balance shaft.
• Twin Cam 103 (1690cc): First appeared on 2010 Touring models as an upgrade option, then became the standard on many Touring and Softail platforms by 2012. The 2011 Touring service manual lists “Displacement 103.0 in3 / 1690 cm3.” The 2013 Dyna service manual confirms “Twin Cam 103, 1690 cm3” via VIN code M.
• Twin Cam 110 (1802cc): CVO-only Screamin’ Eagle variant. Not available in standard production models. Powered the CVO Road Glide Ultra and CVO Limited from 2007 through 2016.

Sportster Displacement: 883cc vs 1200cc

Sportster displacement is one of the most-searched questions in the HD ecosystem. The short answer: the Sportster ran two displacements through its Evolution engine era, and the 883 vs 1200 split defined two distinct model lines.

The 1986-2003 Harley-Davidson Sportster service manual confirms this through VIN decode tables: engine code “M” = 883 cc engine, engine code “P” = 1200 cc engine. The 2008 Sportster service manual confirms both variants remained in production with VIN codes 2 (Evolution 883 cc, air-cooled, fuel-injected) and 3 (Evolution 1200 cc, air-cooled, fuel-injected).

• XLH883 / XL883 family: 883cc (53.9 ci). Models: XLH883 (1986-2003), XLH883 Deluxe (1986-1995), XLH883 Hugger (1987-2003), XL883C Custom (1999+), XL883R Roadster (2002+), Iron 883 (2009-2020).
• XLH1200 / XL1200 family: 1200cc (73.2 ci). Models: XLH1200 (1988-2003), XL1200C Custom (1996+), XL1200S Sport (1996-2003), XL1200N Nightster (2007-2012), Forty-Eight (2010+), Iron 1200 (2018-2020), Roadster XL1200CX (2016-2020).

After 2020, the Sportster nameplate moved to the Revolution Max platform. The Sportster S (2021+) uses the Revolution Max 1250 – a completely different liquid-cooled engine at 1252cc (76.4 ci).

Milwaukee-Eight vs Twin Cam: What Changed in Displacement

The Milwaukee-Eight arrived for 2017 with a redesigned engine family that broke from Twin Cam naming conventions. Instead of a single displacement with variants, HD launched three distinct M8 displacements targeting different market segments.

The move to four valves per cylinder (versus two in the Twin Cam) was a significant engineering change, improving breathing and allowing higher peak output without requiring the extra displacement the Twin Cam needed to hit similar power numbers.

Revolution Max: Harley’s Liquid-Cooled V-Twin

The Revolution Max is architecturally different from every other engine in HD history: it is a liquid-cooled, DOHC V-twin. The 2008 VRSC service manual confirmed the earlier Revolution unit at “1250 cc (76 cubic in.)” for the V-Rod generation, but the Revolution Max is an entirely new design sharing the displacement figure but not the architecture.

The Revolution Max 1250 debuted in the 2021 Pan America 1250 adventure tourer and the Sportster S. The smaller Revolution Max 975 (975cc / 59.6 ci) powers the Nightster (2022+) and Nightster Special. These are HD’s first mass-market DOHC engines with liquid cooling, representing a genuine platform departure from the traditional pushrod V-twin architecture that defined the brand for over a century.

How to Find Your Specific Engine Displacement by VIN

Every Harley-Davidson VIN encodes the engine type in position 5 (counting from the left). Our research cross-referenced the VIN decode tables from multiple service manuals to compile these codes:

Note that VIN code “4” was used for both the TC 88 (1999-2006) and TC 96 (2007+) on Dyna and Touring models – you need the model year to distinguish between them from the VIN alone. The 2009 Touring service manual confirms: “Engine type 4 = Twin Cam 96, 1584 cc air-cooled, fuel-injected.”

Our free VIN decoder and recall lookup decodes the engine code and model year from any HD VIN and cross-references it against the NHTSA recall database.

Cubic Inches to CC Conversion: The Math Behind HD Naming

Harley-Davidson uses the cubic-inch figure as its commercial branding (the “88,” “96,” “103,” “107,” “114,” “117” names) while service manuals specify cubic centimeters for precision. The conversion is 1 cubic inch = 16.387 cc. Our research confirmed this conversion factor directly from the 1986-2003 Sportster service manual: “Cubic inches 16.387064 [to] Cubic centimeters.”

Frequently Asked Questions

What engine size is a stock Harley-Davidson Road Glide?

From 2007 to 2009, the Road Glide came with the Twin Cam 96 (1584cc / 96 ci) as standard. From 2010 onward, the TC 103 (1690cc / 103 ci) became the base option on Touring models, and CVO versions ran the TC 110 (1802cc). After 2017, Road Glide models moved to the Milwaukee-Eight 107 (1746cc) as base, with the 114 (1868cc) available on Special trim, and the 117 (1917cc) on CVO variants.

How many cc is a Harley 883?

The Harley Sportster 883 displaces 883 cubic centimeters (53.9 cubic inches). This figure is confirmed in the 1986-2003 Sportster service manual VIN decode table and again in the 2008 Sportster service manual, which codes the 883cc Evolution engine as VIN type “2.” The 883 ran from 1986 through 2020 on Sportster models before the platform shifted to Revolution Max architecture.

What is the difference between the Twin Cam 88 and Twin Cam 96?

Both are air-cooled, pushrod V-twin engines, but the TC 96 has larger bore dimensions, bringing displacement from 1450cc (88.4 ci) to 1584cc (96.7 ci). The TC 96 also introduced fuel injection as standard across all models where the TC 88 mixed carbureted and EFI versions. The TC 88 ran from 1999 to 2006; the TC 96 replaced it for the 2007 model year across Dyna, Softail, and Touring platforms.

What displacement does the Milwaukee-Eight come in?

The Milwaukee-Eight comes in three production displacements: 107 ci (1746cc) for entry-level Touring, base Softail, and Trike models; 114 ci (1868cc) for mid-range Touring, Fat Boy, and Road King Special; and 117 ci (1917cc) reserved for CVO (Custom Vehicle Operations) models. All three share the same four-valve-per-cylinder, air/oil-cooled architecture introduced for the 2017 model year.

Is the Harley Evolution engine the same as the Twin Cam?

No. The Evolution (Evo) is a separate engine family that ran from 1984 to 1999 on Big Twin models (1340cc / 80 ci) and from 1986 through 2020 on Sportster models (883cc and 1200cc). The Twin Cam replaced the Evolution Big Twin in 1999 with a larger displacement and dual chain-driven camshafts instead of a single gear-driven cam. The Sportster Evolution ran concurrently with both the Twin Cam era and the Milwaukee-Eight era, making it the longest-running HD engine design in production history.

What engine does the Harley-Davidson Dyna use?

The Dyna series ran Twin Cam engines throughout its production life (1991-2017). Early Dynas (1991-1998) used the Evolution 80ci / 1340cc. From 1999, the TC 88 (1450cc) was standard. The 2008 Dyna service manual confirms the TC 96 (1584cc) as the production engine by that year. The TC 103 (1690cc) became an option on Dyna models by 2012. The Dyna platform was discontinued after 2017 and replaced by the Softail lineup.

Related Harley-Davidson Guides

Our research team has cross-referenced engine displacement figures across multiple posts in this series. If you are researching a specific era or problem:

• Evolution vs Twin Cam: Which HD Engine Holds Up Better? – Head-to-head reliability and parts comparison of the two most common HD engine families on the used market.
• Harley Twin Cam Years to Avoid – Our analysis of TC 88 and TC 96 model years with documented issues, organized by NHTSA recall data and forum symptom clusters.
• Shovelhead Years to Avoid – Coverage of the pre-Evolution era, including the 74ci and 80ci Shovelhead production years with known reliability patterns.
• What Is the Harley-Davidson Dyna? – Full model history of the Dyna frame family and the engine variants it carried from 1991 through 2017.
• Harley-Davidson Tire Pressure Chart – The companion reference chart covering correct inflation specs by model and year, sourced from the same service manual library.

Service Manual Sources Used in This Research

The displacement figures for Twin Cam, Sportster Evolution, and V-Rod engines in this chart are verified against primary source documents in our service manual library. Specs for Milwaukee-Eight and Revolution Max engines are sourced from official Harley-Davidson model year specification sheets.

• HD Service Manual, 2004 Touring Models – TC 88: “Piston displacement (approx.) 88 cu. in. (1450 cc)”
• HD Service Manual, 2008 Dyna Models – TC 96: “Piston displacement (approx.) 96 cubic in. / 1584 cc”
• HD Service Manual, 2007 Softail Models – TC 96: VIN code 5 = “1584 cc air-cooled, fuel injected, counterbalanced”
• HD Service Manual, 2009 Touring Models – TC 96: “Engine type 4 = Twin Cam 96, 1584 cc air-cooled, fuel-injected”
• HD Service Manual, 2011 Touring Models – TC 103: “Displacement 103.0 in3 / 1690 cm3”; TC 96: “1584 cm3”
• HD Service Manual, 2013 Dyna Models – TC 103: VIN code M = “Twin Cam 103, 1690 cm3 air-cooled, fuel-injected”
• HD Service Manual, 2013 Softail Models – TC 96B: VIN code 5; TC 103B: VIN codes V = “1690 cm3”; “Displacement 103.0 in3 / 1690 cm3”
• HD Service Manual, 1986-2003 Sportster Models – 883cc: VIN code M; 1200cc: VIN code P; “Cubic inches 16.387064 [to] Cubic centimeters”
• HD Service Manual, 2008 Sportster Models – 883cc: VIN type 2; 1200cc: VIN type 3
• HD Service Manual, 2008 VRSC Models – Revolution 1250: “Piston displacement (approx.) 1250 cc (76 cubic in.)”

For parts sourcing, tuning decisions, or compatibility research, cross-reference the exact service manual for your model year – displacement specs can vary slightly between printing revisions, and the VIN decode table in the introductory section of any HD service manual is the fastest way to confirm your specific engine code.