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Engine Code Designation: Notes

Fifth figure of "Vehicle Warranty Number" on car patent plate identifies engine as follows:

Engine Code Letter
289" 2-Bbl. 200 HP (1) C
  4-Bbl. 225 HP A
  4-Bbl. 271 HP K
352" 4-Bbl. 250 HP X
390" 2-Bbl. 265 HP Y
  4-Bbl. 315 HP Z
427" Two 4-Bbl. 425 HP R
428" 4-Bbl. 345 HP (2) Q
  4-Bbl. Police P
(1) Low Compression 3.
(2) Low Compression 8.