Foxtrot vs Sierra
The Foxtrot and the Sierra are both Submarine classes. The Sierra displaces 7,200 tons — 3.6x the Foxtrot's 1,983 tons. The Foxtrot reaches 16 knots vs 10 knots for the Sierra. Operational range is 20,000 nautical miles for the Foxtrot vs 99,999 for the Sierra. The Foxtrot carries a crew of 78 vs 61 for the Sierra. Submerged displacement is 2,515 tons for the Foxtrot vs 8,300 tons for the Sierra. The Sierra can dive to 600 m compared to 296 m for the Foxtrot. The Foxtrot was produced in 75 units vs 4 for the Sierra. The Foxtrot was commissioned in 1958, 26 years before the Sierra (1984).
| Displacement | 1,983 tons ◉ |
| Maximum speed | 16.0 knots ◉ |
| Range | 20,000 nm at 8 knots ◉ |
| Length | 89.9 m ◉ |
| Beam | 7.4 m ◉ |
| Crew | 78 ◉ |
| Max depth | 296 m ◉ |
| Propulsion | 3 × Kolomna 2D42M 2,000 hp (1,500 kW) diesel engines; 3 × Electric motors (two 1,350 hp and one 2,700 hp); 1 × 180 hp auxiliary motor; 3 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 Foxtrot-class or Sierra-class?
The Sierra-class has greater displacement at 7,200 tons compared to the Foxtrot-class's 1,983 tons.
Which is faster, the Foxtrot-class or Sierra-class?
The Foxtrot-class is faster with a maximum speed of 16 knots compared to the Sierra-class's 10 knots.
Which has longer range, the Foxtrot-class or Sierra-class?
The Sierra-class is nuclear-powered with unlimited range, while the Foxtrot-class has a range of 20,000 nautical miles.
Which is longer, the Foxtrot-class or Sierra-class?
The Sierra-class is longer at 107.2 meters compared to the Foxtrot-class's 89.9 meters.
How many crew members do the Foxtrot-class and Sierra-class have?
The Foxtrot-class has a larger crew complement of 78 compared to the Sierra-class's 61 crew members.
Which can dive deeper, the Foxtrot-class or Sierra-class?
The Sierra-class can dive deeper with a maximum depth of 600 meters compared to the Foxtrot-class's 296 meters.
Which has been built in greater numbers, the Foxtrot-class or Sierra-class?
The Foxtrot-class has been built in greater numbers with 75 vessels compared to 4 vessels of the Sierra-class.