Delta IV vs Romeo
The Delta IV and the Romeo are both Submarine classes. The Delta IV displaces 7,800 tons — 5.3x the Romeo's 1,475 tons. The Delta IV reaches 12 knots vs 15 knots for the Romeo. Operational range is 99,999 nautical miles for the Delta IV vs 9,000 for the Romeo. The Delta IV carries a crew of 120 vs 54 for the Romeo. Submerged displacement is 10,000 tons for the Delta IV vs 1,830 tons for the Romeo. The Delta IV was produced in 18 units vs 133 for the Romeo. The Delta IV was commissioned in 1972, 15 years after the Romeo (1957).
| Displacement | 7,800 tons ◉ |
| Maximum speed | 12.0 knots ◉ |
| Range | Unlimited ◉ |
| Length | 139.0 m ◉ |
| Beam | 12.0 m ◉ |
| Crew | 120 ◉ |
| Max depth | 400 m |
| Propulsion | 2 pressurized water-cooled reactors powering 2 steam turbines driving 2 shafts and each developing 38.7 MW (51,900 shp) |
| Armament |
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| Displacement | 1,475 tons ◉ |
| Maximum speed | 15.0 knots ◉ |
| Range | 9,000 nm at 9 knots ◉ |
| Length | 76.6 m ◉ |
| Beam | 6.7 m ◉ |
| Crew | 54 ◉ |
| Max depth | NA |
| Propulsion | Two diesels delivering 2.94 MW (4000 shp) with two electric motors driving two shafts. |
| Armament |
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Performance Radar Chart
Frequently Asked Questions
Which has greater displacement, the Delta IV-class or Romeo-class?
The Delta IV-class has greater displacement at 7,800 tons compared to the Romeo-class's 1,475 tons.
Which is faster, the Delta IV-class or Romeo-class?
The Romeo-class is faster with a maximum speed of 15 knots compared to the Delta IV-class's 12 knots.
Which has longer range, the Delta IV-class or Romeo-class?
The Delta IV-class is nuclear-powered with unlimited range, while the Romeo-class has a range of 9,000 nautical miles.
Which is longer, the Delta IV-class or Romeo-class?
The Delta IV-class is longer at 139.0 meters compared to the Romeo-class's 76.6 meters.
How many crew members do the Delta IV-class and Romeo-class have?
The Delta IV-class has a larger crew complement of 120 compared to the Romeo-class's 54 crew members.
Which has been built in greater numbers, the Delta IV-class or Romeo-class?
The Romeo-class has been built in greater numbers with 133 vessels compared to 18 vessels of the Delta IV-class.