Ram Viper Engine Specs

Bore, stroke, displacement and compression for all 3 Ram Viper engines, compared side by side. Plus rod ratio and head specs where published.

At a glance

Displacement	488–505 ci
Cylinders	10
Bore	4.000–4.032"
Stroke	3.878–3.961"
Compression	9.6:1
Advertised power	300–500 hp
Years	2004–2006

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
83 Viper V10	505 ci	4.0315" × 3.9606"	9.6:1	500
Viper V10	505 ci	4.0315" × 3.9606"	—	500
Viper 8.0	488 ci	4" × 3.878"	9.6:1	300

Factory cars with a Viper

• Ram 1500: 2004, 500 hp; 2005, 500 hp; 2006, 500 hp

What varies across the family

Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

← All Ram engines