Advance-Rumely OilPull S 30/60 vs Hart-Parr 28-50
Side-by-side specs comparison
Verdict by the numbers
- The Advance-Rumely OilPull S 30/60 is more powerful than the Hart-Parr 28-50: 66 HP versus 55 HP (+11 HP, +20%).
- The Hart-Parr 28-50 is the more recent model: production started in 1927, versus 1924 for the Advance-Rumely OilPull S 30/60.
- The Advance-Rumely OilPull S 30/60 is heavier: 7938 kg versus 3900 kg for the Hart-Parr 28-50.
Full specs comparison
| Advance-Rumely OilPull S 30/60 | Hart-Parr 28-50 | |
|---|---|---|
| Power | 66 HP | 55 HP |
| Production years | 1924–1928 | 1927–1930 |
| Fuel | Kerosene | Gasoline |
| Cylinders | 2 | 4 |
| Displacement | 22.9 L | 11.1 L |
| Weight | 7 938 kg | 3 900 kg |
| Drive | 2WD | 2WD |
| Transmission | Gear | Gear |
| Gears (fwd/rev) | 3 / 1 | 2 / 1 |
| Length | 485 cm | — |
Frequently asked questions
Which is more powerful, the Advance-Rumely OilPull S 30/60 or the Hart-Parr 28-50?
The Advance-Rumely OilPull S 30/60 is more powerful than the Hart-Parr 28-50: 66 HP versus 55 HP (+11 HP, +20%).
Which is more recent, the Advance-Rumely OilPull S 30/60 or the Hart-Parr 28-50?
The Hart-Parr 28-50 is the more recent model: production started in 1927, versus 1924 for the Advance-Rumely OilPull S 30/60.
Which is heavier, the Advance-Rumely OilPull S 30/60 or the Hart-Parr 28-50?
The Advance-Rumely OilPull S 30/60 is heavier: 7938 kg versus 3900 kg for the Hart-Parr 28-50.

