Straight-4
Chrysler introduced a straight-4 derivative of their new Flathead straight-6 in 1926. Initially used by all Chrysler divisions, the straight-4 became Plymouth-only in 1929, lasting in production through 1932.
The original version displaced 185.8 cu in (3,044.7 cc) and produced 38 hp (28 kW). This was only produced in 1926, with displacement reduced to 170.3 cu in (2,790.7 cc) for 1927 through 1929. Power was initially rated the same but was upped to 45 hp (34 kW) during the 1928 model year.
After the introduction of the Plymouth brand in 1929, the base engine was enlarged to 175.4 cu in (2,874.3 cc) for 1930 with the power rating remaining the same. A larger 196 cu in (3,211.9 cc) version was also offered that year with 48 hp (36 kW). The engine was slightly revised for 1932 with a claimed displacement of 196.1 cu in (3,213.5 cc) and either 56 hp (42 kW) or 65 hp (48 kW).
| Displacement | Years | Horsepower | Applications |
|---|---|---|---|
| 185.8 cu in (3,044.7 cc) | 26 | 38 | All S-Series 58 |
| 170.3 cu in (2,790.7 cc) | 27 | 38 | All S-Series 50 |
| 28 | 38-45 | All S-Series 52 | |
| 29 | 45 | Plymouth S-Model Q | |
| 175.4 cu in (2,874.3 cc) | 30 | 45 | Plymouth S-U |
| 196 cu in (3,211.9 cc) | 30 | 48 | Plymouth S-30-U |
| 31 | 48 | Plymouth S-All | |
| 196.1 cu in (3,213.5 cc) | 32 | 65 | Plymouth S-PB |
| 32 | 56 | Plymouth S-PA |
Read more about this topic: Chrysler Flathead Engine