New generation "A" series Poly head motors are not included
in this chart since they have little in common with the early hemi.
Eng#
Year
Name/Make
CI
Comp
HP
WE55
1955
Chrysler
301
8.5:1
188
WE56
1956
Chrysler
331
8.5:1/9:1
225/350
LE57
1957
Chrysler
354
9.25:1
295
58S
1958
Chrysler
354
10:1
310
58W
1958
Chrysler
354
10:1
290
Eng#
Year
Name/Make
CI
Comp
HP
VT-334,336,338
1954
Dodge
241
N/A
N/A
VT-434,436,438
1955
Dodge
259
N/A
N/A
D55
1955
Dodge
270
7.6:1
240
D63-1
1956
Dodge
270
8:1
189
D63-2,D63-3
1956
Dodge
315
8:1
218/230
VT-534,536,538
1957
Dodge
315
N/A
N/A
KDS
1957
Dodge
325
8.5:1
310
L325/LD2
1958
Dodge
325
9:1
252/265
L8-D1,D2,D6,WS
1958
Dodge
315
N/A
N/A
Eng#
Year
Name/Make
CI
Comp
HP
P27
1955
Plymouth
241
7.6:1
157
P27
1955
Plymouth
259
7.6:1
167/177
P28
1956
Plymouth
270
8:1
180
Back
Eng# |
Year |
Name/Make |
CI |
Comp |
HP |
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| WE55 | 1955 | Chrysler | 301 | 8.5:1 | 188 | |||||
| WE56 | 1956 | Chrysler | 331 | 8.5:1/9:1 | 225/350 | |||||
| LE57 | 1957 | Chrysler | 354 | 9.25:1 | 295 | |||||
| 58S | 1958 | Chrysler | 354 | 10:1 | 310 | |||||
| 58W | 1958 | Chrysler | 354 | 10:1 | 290 | |||||
| Eng# | Year | Name/Make | CI | Comp | HP | VT-334,336,338 | 1954 | Dodge | 241 | N/A | N/A |
| VT-434,436,438 | 1955 | Dodge | 259 | N/A | N/A | |||||
| D55 | 1955 | Dodge | 270 | 7.6:1 | 240 | |||||
| D63-1 | 1956 | Dodge | 270 | 8:1 | 189 | |||||
| D63-2,D63-3 | 1956 | Dodge | 315 | 8:1 | 218/230 | |||||
| VT-534,536,538 | 1957 | Dodge | 315 | N/A | N/A | |||||
| KDS | 1957 | Dodge | 325 | 8.5:1 | 310 | |||||
| L325/LD2 | 1958 | Dodge | 325 | 9:1 | 252/265 | |||||
| L8-D1,D2,D6,WS | 1958 | Dodge | 315 | N/A | N/A | |||||
| Eng# | Year | Name/Make | CI | Comp | HP | |||||
| P27 | 1955 | Plymouth | 241 | 7.6:1 | 157 | |||||
| P27 | 1955 | Plymouth | 259 | 7.6:1 | 167/177 | |||||
| P28 | 1956 | Plymouth | 270 | 8:1 | 180 |