Dodge's Hemi was called the Red Ram, introduced in 1953. They have the smallest bore center distance of any hemi engine at 4.1875 in (106.4 mm).
241
Dodge also had a 241 in³ (3.9 L) version in 1952. Bore was 3.4375 in (92 mm) and stroke was 3.25 in (83 mm). It produced just 140 hp (104 kW). Plymouth's 241 version for 1955 had polyspherical heads.
270
The 270 displaced 271 in³ (4.4 L) and was used in the 1955 and 1956 Dodge vehicles. Bore was 3.625 in (92 mm) and stroke was 3.25 in (83 mm). See also the Plymouth 270 poly-head.
315
For 1956, Dodge upped the displacement to 315 in³ (5.2 L) with a longer 3.80 in (97 mm) stroke and a taller raised-deck block. right
325
Dodge and the low-line (non-premium) DeSoto shared a 325 in³ (5.3 L) engine for 1957, with Dodge retaining the engine until 1958. The engine used a 3.6875 in (94 mm) bore and 3.80 in (97 mm) stroke. Note that DeSoto's version did not use hemispherical heads.