Romeo vs Sierra
The Romeo and the Sierra are both Submarine classes. The Sierra displaces 7,200 tons — 4.9x the Romeo's 1,475 tons. The Romeo reaches 15 knots vs 10 knots for the Sierra. Operational range is 9,000 nautical miles for the Romeo vs 99,999 for the Sierra. The Romeo carries a crew of 54 vs 61 for the Sierra. Submerged displacement is 1,830 tons for the Romeo vs 8,300 tons for the Sierra. The Romeo was produced in 133 units vs 4 for the Sierra. The Romeo was commissioned in 1957, 27 years before the Sierra (1984).
| 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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| Displacement | 7,200 tons ◉ |
| Maximum speed | 10.0 knots ◉ |
| Range | Unlimited ◉ |
| Length | 107.2 m ◉ |
| Beam | 12.3 m ◉ |
| Crew | 61 ◉ |
| Max depth | 600 m |
| Propulsion | 1 × PWR, 190 MW (HEU <= 45%), 2 × 1,002 hp (747 kW) emergency motors, 1 shaft, 2 spinners |
| Armament |
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Performance Radar Chart
Frequently Asked Questions
Which has greater displacement, the Romeo-class or Sierra-class?
The Sierra-class has greater displacement at 7,200 tons compared to the Romeo-class's 1,475 tons.
Which is faster, the Romeo-class or Sierra-class?
The Romeo-class is faster with a maximum speed of 15 knots compared to the Sierra-class's 10 knots.
Which has longer range, the Romeo-class or Sierra-class?
The Sierra-class is nuclear-powered with unlimited range, while the Romeo-class has a range of 9,000 nautical miles.
Which is longer, the Romeo-class or Sierra-class?
The Sierra-class is longer at 107.2 meters compared to the Romeo-class's 76.6 meters.
How many crew members do the Romeo-class and Sierra-class have?
The Sierra-class has a larger crew complement of 61 compared to the Romeo-class's 54 crew members.
Which has been built in greater numbers, the Romeo-class or Sierra-class?
The Romeo-class has been built in greater numbers with 133 vessels compared to 4 vessels of the Sierra-class.