GlobalMilitary.net Open-source military intelligence Updated daily

Improved Kilo vs Sierra

Improved Kilo vs Sierra at a glance — displacement 2,325 vs 7,200 tons, length 72 vs 107 m, speed 12 vs 10 knots, crew 52 vs 61.

Sierra submarine side profile drawing
🇷🇺 Sierra
Specifications
Improved Kilo Sierra
Origin 🇷🇺 Russia 🇷🇺 Ex-USSR
Category Submarine Submarine
Type Attack submarine Nuclear-powered attack submarine
Manufacturer Rubin Design Bureau Krasnoye Sormovo
Year introduced 1980 1984
Number built 75 units 4 units
Estimated unit price $200 million NA
Displacement 2,325 tons 7,200 tons
Maximum speed 12.0 knots 10.0 knots
Range 7,500 nm at 7 knots Unlimited
Length 72.6 m 107.2 m
Beam 9.9 m 12.3 m
Crew 52 61
Max depth 300 m 600 m
Performance Radar Chart
Armament & Systems
Improved Kilo Sierra
Armament
  • 6 × 533 mm (21 in) torpedo tubes
  • 18 torpedoes
  • 4 Kalibr/Club land-attack cruise missile, anti-ship missile and anti-submarine missile (some versions)
  • 24 mines
  • 8 9K34 Strela-3 (SA-N-8 Gremlin) or 8 9K310 Igla-1 (SA-N-10 Gimlet) surface-to-air missiles
  • 4 × 650 mm (26 in) torpedo tubes (only Sierra I)
  • 4 × 530 mm (21 in) torpedo tubes (6 x Sierra II)
  • SS-N-21 Sampson SLCM
  • SS-N-15 Starfish anti-submarine weapon
  • SS-N-16 Stallion
  • 42 mines (instead of torpedoes)
Propulsion Diesel-electric propulsion; 2 × 1000 kW diesel generators; 1 × 5,500–6,800 shp (4,100–5,100 kW) propulsion motor; 1 × fixed-pitch 6-bladed or 7-bladed propeller 1 × PWR, 190 MW (HEU <= 45%), 2 × 1,002 hp (747 kW) emergency motors, 1 shaft, 2 spinners
Change comparison vs

Frequently Asked Questions

Which has greater displacement, the Improved Kilo-class or Sierra-class?
The Sierra-class has greater displacement at 7,200 tons compared to the Improved Kilo-class's 2,325 tons.
Which is faster, the Improved Kilo-class or Sierra-class?
The Improved Kilo-class is faster with a maximum speed of 12 knots compared to the Sierra-class's 10 knots.
Which has longer range, the Improved Kilo-class or Sierra-class?
The Sierra-class is nuclear-powered with unlimited range, while the Improved Kilo-class has a range of 7,500 nautical miles.
Which is longer, the Improved Kilo-class or Sierra-class?
The Sierra-class is longer at 107.2 meters compared to the Improved Kilo-class's 72.6 meters.
How many crew members do the Improved Kilo-class and Sierra-class have?
The Sierra-class has a larger crew complement of 61 compared to the Improved Kilo-class's 52 crew members.
Which can dive deeper, the Improved Kilo-class or Sierra-class?
The Sierra-class can dive deeper with a maximum depth of 600 meters compared to the Improved Kilo-class's 300 meters.
Which has been built in greater numbers, the Improved Kilo-class or Sierra-class?
The Improved Kilo-class has been built in greater numbers with 75 vessels compared to 4 vessels of the Sierra-class.